Add ModeProfile.msg (atomic resolved flag set) to rov_interfaces.
Add mode_profile_loader node + config/mode_profiles.yaml to rov_mission:
ROV/AUV profiles plus custom/hybrid Save As, published latched on
/rov/mode/profile, reloadable via /rov/mode/reload service.
cockpit_bridge subscribes and surfaces flags to the Cockpit data lake
as external/rov-*. Single source of truth; widgets read flags, not modes.
Verified end-to-end: ROV and AUV resolve correctly and live reload works.
Refs DIR-1/2 (ROV/AUV duality), DIR-9 (amended: ARM-bounded recording), DIR-10.
