Wire npc-runtime-snapshot and combat-health GET clients with combat-active
~1 Hz polling, interpolated telegraph countdown, and PlayerCombatHp/NpcState/
Telegraph HUD labels; includes GdUnit tests, manual QA, and doc updates.
Kickoff plan for Godot poll clients, combat-active HUD labels, and manual QA;
records kickoff decisions on poll gating, HUD scope, and windup interpolation.