fix(registry): stabilize ROS distro action schema

[Xuwznln]

Summary

• normalize NavigateThroughPoses result mapping across ROS 2 Jazzy and Humble
• keep the shared registry YAML deterministic on both distributions
• add the compatibility test to both CI matrix jobs

Root cause

Humble exposes NavigateThroughPoses.Result as std_msgs/Empty result, while Jazzy exposes error_code and error_msg. UniLabOS does not consume those result fields, so the public registry contract now uses an empty result object on both distributions.

Validation

• Humble registry/ROS subset: 16 passed
• Jazzy registry/ROS subset: 16 passed
• complete_registry output hashes are identical for Humble and Jazzy