Add diagnostics session recorder

[Hamnah228]

Summary

• Add an installed diagnostics recorder command using rosbag2.
• Record /diagnostics with duration, topic, output directory, and mock/live label options.
• Write session metadata and protect existing output directories.
• Add failure, shutdown, and real rosbag2 round-trip tests.
• Document inspection and isolated-domain replay.
• Ignore generated bag files.

Validation

• colcon build --symlink-install
• ROS_DOMAIN_ID=42 colcon test --event-handlers console_direct+
• colcon test-result --all --verbose
• Result: 49 tests, 0 errors, 0 failures, 0 skipped.
• Timed and Ctrl+C recordings reopened successfully with ros2 bag info.
• Mock recording replayed without the temporary publisher.

Evidence

A separate mock recording was shared with Malik:

waybionic-diagnostics-recorder-pr-mock.tar.gz

The recording is intentionally not committed to Git.

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 4940c6d2-92cf-4258-8d5d-c4cd7c90fbe6

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[yassinsolim]

Reviewed 0a2e9e5. No blocking finding. Strict dependency installation/checking and all six recorder tests pass in an isolated Jazzy container, including a real rosbag recording/readback that preserves the diagnostic timestamp, level, message, and key/value data. I checked topic selection, existing-directory protection, metadata, and timed shutdown. This was mock-publisher validation, not a physical-hardware session.