feat: implement Phase 1 MVP foundation

.dockerignore

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+# Git
+.git
+.gitignore
+
+# IDE
+.idea
+.vs
+.vscode
+*.user
+*.suo
+
+# Build outputs
+**/bin
+**/obj
+**/out
+**/publish
+
+# Test results
+**/TestResults
+**/coverage
+
+# NuGet packages
+**/nupkgs
+
+# Documentation
+docs/
+
+# Samples (not needed for deployment)
+samples/
+
+# Tests (not needed for deployment)
+tests/
+
+# Local settings
+appsettings.Development.json
+*.local.json
+
+# Database files
+*.db
+*.db-shm
+*.db-wal
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+logs/
+
+# Temporary files
+*.tmp
+*.temp

.editorconfig

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+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# All files
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+# XML files
+[*.xml]
+indent_size = 2
+
+# JSON files
+[*.json]
+indent_size = 2
+
+# YAML files
+[*.{yml,yaml}]
+indent_size = 2
+
+# Markdown files
+[*.md]
+trim_trailing_whitespace = false
+
+# Solution and project files
+[*.{sln,csproj,vbproj,vcxproj,vcxproj.filters,proj,projitems,shproj}]
+indent_size = 2
+
+# Props and targets files
+[*.{props,targets}]
+indent_size = 2
+
+# C# files
+[*.cs]
+# New line preferences
+csharp_new_line_before_open_brace = all
+csharp_new_line_before_else = true
+csharp_new_line_before_catch = true
+csharp_new_line_before_finally = true
+csharp_new_line_before_members_in_object_initializers = true
+csharp_new_line_before_members_in_anonymous_types = true
+csharp_new_line_between_query_expression_clauses = true
+
+# Indentation preferences
+csharp_indent_case_contents = true
+csharp_indent_switch_labels = true
+csharp_indent_labels = flush_left
+csharp_indent_block_contents = true
+csharp_indent_braces = false
+csharp_indent_case_contents_when_block = true
+
+# Space preferences
+csharp_space_after_cast = false
+csharp_space_after_keywords_in_control_flow_statements = true
+csharp_space_between_parentheses = false
+csharp_space_before_colon_in_inheritance_clause = true
+csharp_space_after_colon_in_inheritance_clause = true
+csharp_space_around_binary_operators = before_and_after
+csharp_space_between_method_declaration_parameter_list_parentheses = false
+csharp_space_between_method_declaration_empty_parameter_list_parentheses = false
+csharp_space_between_method_declaration_name_and_open_parenthesis = false
+csharp_space_between_method_call_parameter_list_parentheses = false
+csharp_space_between_method_call_empty_parameter_list_parentheses = false
+csharp_space_between_method_call_name_and_opening_parenthesis = false
+csharp_space_after_comma = true
+csharp_space_before_comma = false
+csharp_space_after_dot = false
+csharp_space_before_dot = false
+csharp_space_after_semicolon_in_for_statement = true
+csharp_space_before_semicolon_in_for_statement = false
+csharp_space_around_declaration_statements = false
+csharp_space_before_open_square_brackets = false
+csharp_space_between_empty_square_brackets = false
+csharp_space_between_square_brackets = false
+
+# Wrapping preferences
+csharp_preserve_single_line_statements = false
+csharp_preserve_single_line_blocks = true
+
+# Expression-level preferences
+csharp_prefer_braces = true:suggestion
+csharp_style_deconstructed_variable_declaration = true:suggestion
+csharp_prefer_simple_default_expression = true:suggestion
+csharp_style_pattern_local_over_anonymous_function = true:suggestion
+csharp_style_inlined_variable_declaration = true:suggestion
+
+# Expression-bodied members
+csharp_style_expression_bodied_methods = when_on_single_line:suggestion
+csharp_style_expression_bodied_constructors = false:suggestion
+csharp_style_expression_bodied_operators = when_on_single_line:suggestion
+csharp_style_expression_bodied_properties = when_on_single_line:suggestion
+csharp_style_expression_bodied_indexers = when_on_single_line:suggestion
+csharp_style_expression_bodied_accessors = when_on_single_line:suggestion
+csharp_style_expression_bodied_lambdas = when_on_single_line:suggestion
+csharp_style_expression_bodied_local_functions = when_on_single_line:suggestion
+
+# Pattern matching
+csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
+csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
+
+# Null checking
+csharp_style_throw_expression = true:suggestion
+csharp_style_conditional_delegate_call = true:suggestion
+
+# Modifier preferences
+csharp_prefer_static_local_function = true:suggestion
+csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async:suggestion
+
+# Using directive preferences
+csharp_using_directive_placement = outside_namespace:suggestion
+
+# Namespace preferences
+csharp_style_namespace_declarations = file_scoped:suggestion
+
+# Code style preferences
+csharp_style_var_for_built_in_types = true:suggestion
+csharp_style_var_when_type_is_apparent = true:suggestion
+csharp_style_var_elsewhere = true:suggestion
+
+# Naming conventions
+dotnet_naming_rule.private_fields_underscore.symbols = private_fields
+dotnet_naming_rule.private_fields_underscore.style = underscore_prefix
+dotnet_naming_rule.private_fields_underscore.severity = suggestion
+
+dotnet_naming_symbols.private_fields.applicable_kinds = field
+dotnet_naming_symbols.private_fields.applicable_accessibilities = private
+
+dotnet_naming_style.underscore_prefix.capitalization = camel_case
+dotnet_naming_style.underscore_prefix.required_prefix = _
+
+dotnet_naming_rule.constants_uppercase.symbols = constants
+dotnet_naming_rule.constants_uppercase.style = pascal_case_style
+dotnet_naming_rule.constants_uppercase.severity = suggestion
+
+dotnet_naming_symbols.constants.applicable_kinds = field
+dotnet_naming_symbols.constants.required_modifiers = const
+
+dotnet_naming_style.pascal_case_style.capitalization = pascal_case
+
+# .NET code style settings
+dotnet_style_qualification_for_field = false:suggestion
+dotnet_style_qualification_for_property = false:suggestion
+dotnet_style_qualification_for_method = false:suggestion
+dotnet_style_qualification_for_event = false:suggestion
+dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion
+dotnet_style_predefined_type_for_member_access = true:suggestion
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:suggestion
+dotnet_style_readonly_field = true:suggestion
+dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity:suggestion
+dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity:suggestion
+dotnet_style_parentheses_in_other_binary_operators = always_for_clarity:suggestion
+dotnet_style_parentheses_in_other_operators = never_if_unnecessary:suggestion
+dotnet_style_object_initializer = true:suggestion
+dotnet_style_collection_initializer = true:suggestion
+dotnet_style_explicit_tuple_names = true:suggestion
+dotnet_style_prefer_inferred_tuple_names = true:suggestion
+dotnet_style_prefer_inferred_anonymous_type_member_names = true:suggestion
+dotnet_style_prefer_auto_properties = true:suggestion
+dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion
+dotnet_style_prefer_conditional_expression_over_assignment = true:suggestion
+dotnet_style_prefer_conditional_expression_over_return = true:suggestion
+dotnet_style_coalesce_expression = true:suggestion
+dotnet_style_null_propagation = true:suggestion
+
+# Organize usings
+dotnet_sort_system_directives_first = true
+dotnet_separate_import_directive_groups = false
+
+# IDE analyzers
+dotnet_diagnostic.IDE0005.severity = warning

.github/dependabot.yml

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+version: 2
+updates:
+  # NuGet packages
+  - package-ecosystem: "nuget"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 10
+    groups:
+      microsoft:
+        patterns:
+          - "Microsoft.*"
+      efcore:
+        patterns:
+          - "Microsoft.EntityFrameworkCore*"
+          - "Npgsql.EntityFrameworkCore*"
+      testing:
+        patterns:
+          - "xunit*"
+          - "FluentAssertions"
+          - "Moq"
+          - "coverlet*"
+          - "Testcontainers*"
+    labels:
+      - "dependencies"
+      - "nuget"
+
+  # GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 5
+    labels:
+      - "dependencies"
+      - "github-actions"

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+env:
+  DOTNET_VERSION: '8.0.x'
+  DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
+  DOTNET_CLI_TELEMETRY_OPTOUT: true
+
+jobs:
+  build:
+    name: Build and Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: ${{ env.DOTNET_VERSION }}
+
+      - name: Restore dependencies
+        run: dotnet restore
+
+      - name: Build
+        run: dotnet build --no-restore --configuration Release
+
+      - name: Test with coverage
+        run: |
+          dotnet test --no-build --configuration Release \
+            --collect:"XPlat Code Coverage" \
+            --results-directory ./coverage \
+            --logger "trx;LogFileName=test-results.trx"
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: test-results
+          path: coverage/*.trx
+
+      - name: Upload coverage reports
+        uses: actions/upload-artifact@v4
+        if: success()
+        with:
+          name: coverage-reports
+          path: coverage/**/coverage.cobertura.xml
+
+      - name: Code Coverage Summary
+        uses: irongut/CodeCoverageSummary@v1.3.0
+        if: success()
+        with:
+          filename: coverage/**/coverage.cobertura.xml
+          badge: true
+          format: markdown
+          output: both
+          thresholds: '60 80'
+
+      - name: Add Coverage PR Comment
+        uses: marocchino/sticky-pull-request-comment@v2
+        if: github.event_name == 'pull_request' && success()
+        with:
+          recreate: true
+          path: code-coverage-results.md
+
+  lint:
+    name: Code Quality
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: ${{ env.DOTNET_VERSION }}
+
+      - name: Restore dependencies
+        run: dotnet restore
+
+      - name: Check formatting
+        run: dotnet format --verify-no-changes --verbosity diagnostic
+
+      - name: Build with warnings as errors (Release)
+        run: dotnet build --configuration Release /p:TreatWarningsAsErrors=true