Add telemetry and cancellable inference

[TorstenDittmann]

Summary

• add structured JSON request logs, validated request IDs, and Prometheus HTTP/pipeline/runtime metrics
• propagate request deadlines and client cancellation into ONNX Runtime with per-run cancellation options
• make shutdown deterministic with draining readiness, request rejection, a configurable grace period, and forced inference cancellation
• split liveness and readiness endpoints while retaining /healthz compatibility
• embed release/build metadata and document the operational contract

Validation

• go test -race ./...
• go vet ./...
• make build
• npm run build --prefix docs
• git diff --check

Docker validation could not run locally because the Docker daemon is not running; the existing CI matrix builds both amd64 and arm64 images. The integration suite will exercise real ONNX inference and the new cancellation assertion in CI.

[greptile-apps]

Greptile Summary

The latest changes complete the telemetry and cancellation fixes requested by the previous review.

• Moves request instrumentation to the server boundary so /metrics and unmatched requests receive request IDs, logs, and HTTP metrics.
• Checks request cancellation after inference and focal-point calculation before reporting success.
• Adds focused regression tests for post-inference cancellation and unmatched-route telemetry.

Confidence Score: 5/5

The PR appears safe to merge; both previous findings are resolved and the latest changes introduce no accepted new issue.

The handler now prevents successful responses after request cancellation, and server-boundary instrumentation covers registered, metrics, and unmatched routes without introducing an established functional failure.

Important Files Changed

Filename	Overview
cmd/autogravity/main.go	Wraps the complete HTTP mux with telemetry and adds cancellation checks around post-inference processing.
cmd/autogravity/main_test.go	Adds regression coverage for cancellation after inference and instrumentation of unmatched routes.
cmd/autogravity/telemetry.go	Derives bounded route labels when telemetry is applied at the server boundary.

_{Reviews (2): Last reviewed commit: "fix: cover post-inference cancellation a..." | Re-trigger Greptile}