feat(debugging): add developer debugging toolkit#659
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RUKAYAT-CODER merged 1 commit intoMay 27, 2026
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Implements an in-process debugging toolkit for developers: - Request/response inspection: DebugCaptureMiddleware records every exchange into a bounded in-memory ring buffer with header redaction and body truncation; exposed via GET /debug/requests[/:id]. - Request replay: RequestReplayService re-issues a captured request against the running instance (or a custom base URL) and diffs the response status; POST /debug/requests/:id/replay with header/body overrides for replacing redacted credentials. - Performance timeline: TimelineRecorder captures per-phase spans with high-resolution timing; PerformanceTimelineService surfaces slowest hotspots; GET /debug/requests/:id/timeline. - Stack trace enhancement: StackTraceService parses raw V8 stacks into structured frames, flags application vs node_module/internal frames, follows the error cause chain; GET /debug/requests/:id/trace. Capture middleware mounts only outside production (or DEBUG_CAPTURE=true) and excludes /debug/* to avoid recursion. Endpoints are admin-only. Wires DebuggingModule into AppModule.
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Summary
Adds an in-process developer debugging toolkit (new module
src/debugging/) covering all acceptance criteria of the issue.DebugCaptureMiddlewarerecords every exchange into a bounded in-memory ring buffer (RequestCaptureService) with sensitive-header redaction and body truncation.GET /debug/requests,GET /debug/requests/:idRequestReplayServicere-issues a captured request against the running instance (or a custombaseUrl), supports header/body overrides for replacing redacted credentials, and diffs the response status.POST /debug/requests/:id/replayTimelineRecordercaptures per-phase spans with high-resolution timing;PerformanceTimelineService.hotspots()surfaces the slowest phases.GET /debug/requests/:id/timelineStackTraceServiceparses raw V8 stacks into structured frames, flags application vsnode_module/internal frames, and follows the errorcausechain.GET /debug/requests/:id/traceNotes
DEBUG_CAPTURE=true) and excludes/debug/*to avoid recursion.JwtAuthGuard+RolesGuard,UserRole.ADMIN).DebuggingModuleis wired intoAppModule. Seesrc/debugging/README.mdfor details.Closes #652