[log] Add debug logging to HTTP server lifecycle in serve.go

[github-actions]

Adds 5 meaningful debugLog calls to serveAndWait in internal/cmd/serve.go, covering key HTTP server lifecycle events:

Log call	Event
Starting HTTP server: addr=%s, shutdownTimeout=%s	Function entry — server address and timeout
HTTP server exited unexpectedly, triggering shutdown: %v	Unexpected exit from serveFn before context is cancelled
Shutdown signal received, beginning graceful HTTP server shutdown	Context cancellation — graceful shutdown begins
Graceful shutdown failed, forcing close: %v	httpServer.Shutdown() returned an error
HTTP server shut down gracefully	Clean graceful shutdown path

Why this file?

serveAndWait is the core server lifecycle helper called from root.go for every gateway startup. It orchestrates background serving, signal handling, graceful shutdown, and error propagation — but had zero debug visibility. These logs help diagnose startup failures and shutdown timing issues.

Implementation notes

• Reuses the existing package-level debugLog = logger.New("cmd:root") declared in root.go — no new logger or import needed
• No side effects in log arguments (only uses already-computed values httpServer.Addr, timeout, err)
• All tests pass (make test-all green; Rust guard failure is a pre-existing network sandbox limitation)

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

• index.crates.io

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "index.crates.io"

See Network Configuration for more information.

Generated by Go Logger Enhancement · sonnet46 8.3M · ◷

[Copilot]

Pull request overview

This PR improves debuggability of the gateway’s HTTP server lifecycle by adding debugLog statements to serveAndWait (internal/cmd/serve.go), which is used as the shared serve/shutdown helper for gateway startup and proxy mode.

Changes:

• Add a debug log at serveAndWait entry with server address and shutdown timeout.
• Add debug logs for unexpected server exit (triggering cancellation) and for the shutdown path (start, shutdown failure with forced close, graceful completion).

Show a summary per file

File	Description
internal/cmd/serve.go	Adds debug-level visibility into core HTTP server start/stop lifecycle within serveAndWait.

Copilot's findings

Tip

Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

• Files reviewed: 1/1 changed files
• Comments generated: 1