Implements ticket #84 for Sprint 3:
- Replace single bare NPC with 3 distinct NPCs: dock worker (16,13)
with full 4-phase routine and MovementSpeed(2), field tech (14,18)
with partial routine, stationary guard (18,14) with no routine
- Register all entities (player + 3 NPCs) in EntityRegistry
- Populate RelationshipGraph with colleague and rival edges
- Add NpcPlugin to app for routine system registration
- Add multi-entity visibility tests: 3 NPCs in LOS all visible,
NPC behind wall excluded from snapshot
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.6
0b599ed662