Add telemetry

.env.example

@@ -44,3 +44,11 @@ CBRIDGE__AUTH__PEM_PATH=/app/data/YOUR_PEM_FILE.pem
 
 # Git
 CBRIDGE__GIT__REPO_PATH=/app/data/git_repo
+
+# Telemetry
+# OpenTelemetry is disabled by default
+# and only enabled when an OTLP endpoint is explicitly configured,
+# e.g. for a local Jaeger instance:
+# OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4317
+# RUST_LOG=commit_bridge=info
+# CBRIDGE__TELEMETRY__MARK_CLIENT_ERRORS_AS_ERROR=true

AGENTS.md

@@ -26,3 +26,7 @@ This file contains crucial context for AI agents working in this repository.
   1. `polling/`: Periodically checks remote git repositories for updates.
   2. `trigger/`: Receives update events from the polling engine via `mpsc` channels and triggers GitHub Action workflows on target repositories.
 - **Error Handling**: Use domain-specific error enums (`HandlerError`, `FatalError`) defined in `src/error.rs` using the `thiserror` crate. Ensure `IntoResponse` is implemented for any errors that bubble up to Axum handlers.
+
+## Reviews
+
+When reviewing the correctness of code, always make sure that a potential issue can actually arise _in the context_ of the affected piece of code.