refactor(usecase): migrate write operations to provider interfaces

[mpyw]

Summary

• Migrate all write use cases (create, update, delete, restore) from AWS-specific API interfaces to cloud-agnostic provider interfaces
• Update provider interfaces with write result types (ParameterWriteResult, SecretWriteResult, SecretDeleteResult, SecretRestoreResult)
• Update CLI commands and GUI to use AWS adapters instead of raw AWS clients
• Update all related tests with new mock implementations

This completes PR #3 of the multi-cloud refactoring roadmap.

Changes

Provider Layer

• internal/provider/parameter.go - Add ParameterWriteResult return type to PutParameter
• internal/provider/secret.go - Add result return types to write operations
• internal/provider/aws/param/adapter.go - Update PutParameter to return result
• internal/provider/aws/secret/adapter.go - Update write methods to return results

Model Layer

• internal/model/parameter.go - Add ParameterWriteResult type
• internal/model/secret.go - Add SecretWriteResult, SecretDeleteResult, SecretRestoreResult types

Use Case Layer

• internal/usecase/param/create.go - Use provider interface
• internal/usecase/param/update.go - Use provider interface, add GetCurrentValue
• internal/usecase/param/delete.go - Use provider interface
• internal/usecase/secret/create.go - Use provider interface
• internal/usecase/secret/update.go - Use provider interface (removed Description support)
• internal/usecase/secret/delete.go - Use provider interface (removed RecoveryWindow from input)
• internal/usecase/secret/restore.go - Use provider interface

CLI Layer

• All param/secret write commands now use awsparam.NewAdapter() / awssecret.NewAdapter()
• Removed getCurrentValue from CLI layer (moved to usecase)
• Deleted obsolete update_internal_test.go

GUI Layer

• internal/gui/param.go - Use adapter for ParamSet, ParamDelete
• internal/gui/secret.go - Use adapter for SecretCreate, SecretUpdate, SecretDelete, SecretRestore

Test plan

• make test - All tests pass
• make lint - No issues

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 93.80531% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.32%. Comparing base (53b8cf3) to head (3af18d5).
⚠️ Report is 1 commits behind head on multicloud.

Files with missing lines	Patch %	Lines
internal/usecase/param/update.go	68.75%	5 Missing ⚠️
internal/cli/commands/param/update/update.go	75.00%	1 Missing ⚠️
internal/provider/aws/secret/adapter.go	96.77%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff               @@
##           multicloud     #153      +/-   ##
==============================================
+ Coverage       87.79%   88.32%   +0.52%     
==============================================
  Files             139      139              
  Lines            8204     8168      -36     
==============================================
+ Hits             7203     7214      +11     
+ Misses            754      698      -56     
- Partials          247      256       +9     

Flag	Coverage Δ
e2e	66.36% <86.72%> (+0.89%)	⬆️
platform-darwin	64.38% <ø> (ø)
platform-linux	62.85% <ø> (ø)
platform-windows	73.46% <ø> (ø)
unittests	75.85% <48.67%> (-0.39%)	⬇️

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