fix(mavlink): request autopilot version during bootstrap

[mbuckton]

What changed

• wires MAVLink bootstrap to the recorded endpoint response topic and correlation route
• sends MAV_CMD_REQUEST_MESSAGE (512) for AUTOPILOT_VERSION (148)
• maps both MISSING_AUTOPILOT_VERSION and MISSING_CAPABILITIES to the same request
• deduplicates the shared request and keeps the existing 2-second retry cadence
• deliberately ignores every non-148 bootstrap event so this PR does not activate unrelated requests
• adds focused tests for command contents, routing, missing routes, request deduplication, retries, and clearing both degraded states from one response

Root cause

The readiness and bootstrap state engine already produced a request for message 148, but MavlinkTwinUpdater constructed MavlinkDroneMonitor with a null MavlinkBootstrapEventPublisher. ArduPilot does not have to stream AUTOPILOT_VERSION, so the twin remained degraded.

Other configured bootstrap requests left dormant

Missing state	Configured action
MISSING_HOME_POSITION	request HOME_POSITION (242) once
MISSING_BATTERY_STATE	request BATTERY_STATUS (147) once
MISSING_GLOBAL_POSITION	stream GLOBAL_POSITION_INT (33) at 2 Hz
MISSING_GPS_FIX	stream GPS_RAW_INT (24) at 1 Hz
MISSING_SYSTEM_STATE	stream SYS_STATUS (1) at 1 Hz

STALE_POSITION and STALE_POWER currently have no recovery request mapping. These should be reviewed separately before activating the remaining publisher paths.

Validation

Focused tests were added, but local Maven could not reach repository.mapsmessaging.io or Maven Central and stopped during POM resolution before compilation. Repository CI is the executable validation path.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ebb38664-7e03-4cf5-9411-68a5e967fd55

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

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.}