Add Go server tests with coverage reporting to CI workflow

[Copilot]

Integrates make server-tests into the GitHub Actions workflow with coverage collection and PR reporting.

Changes

• Server implementation (server/)

  • Basic HTTP server with health check and greeting endpoints
  • Test suite covering all handlers (64.3% coverage)
  • Go 1.24 module initialization

• Build infrastructure

  • Makefile with server-tests target executing go test -coverprofile -covermode=atomic
  • Coverage output via go tool cover -func

• CI workflow (.github/workflows/static.yml)

  • Go 1.24 setup
  • make server-tests execution with output capture
  • Coverage artifact upload (30-day retention)
  • Automated PR comments with pass/fail status, coverage percentage, and function-level breakdown
  • Added pull-requests: write permission

• Repository hygiene

  • .gitignore entries for *.out and test output files

Example Output

The workflow generates PR comments like:

## Server Tests Report ✅

**Status:** PASSED
**Coverage:** 64.3%

### Coverage Details
github.com/.../main.go:16:  HealthHandler   100.0%
github.com/.../main.go:26:  GreetingHandler 100.0%
github.com/.../main.go:39:  main            0.0%
total:                      (statements)    64.3%

Original prompt

Enhance this github actions workflow to include the running of make server-tests, capture and attach the go tool code coverage output. Report in a comment on the overal pass/fail ratus.

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