[codex] Add recovery supervisor diagnostics

[rsasaki0109]

Summary

• add a recovery-supervisor state machine over the existing alignment gates
• latch /reinitialization_requested after a trigger until a new /initialpose clears it
• expose recovery state/action and latch age fields in /alignment_status
• document the new diagnostics and enable the latch explicitly in recommended parameter files

Validation

• git diff --check
• source scripts/setup_local_env.sh && cd ../build_ws && colcon build --symlink-install --packages-up-to lidar_localization_ros2

Notes

The existing gate/retry behavior is preserved. This PR adds stateful observability and makes the reinitialization request behavior match the documented latched signal semantics.