xarmian dab6d6c9c9 feat: implement graceful shutdown with request draining (TASK-159) ...

- Add signal handler for SIGINT/SIGTERM with 30s grace period
- Add Server.Shutdown() for graceful HTTP connection draining
- Add EventBus.Close() to cleanly terminate SSE subscribers
- Configure HTTP server timeouts (read: 15s, header: 5s, idle: 120s)
- Fix SetWebUI nil router panic by calling ensureRouter()
- Add Server.Handler() for httptest compatibility

2026-04-05 14:56:56 +00:00

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feat: implement graceful shutdown with request draining (TASK-159)

2026-04-05 14:56:56 +00:00