fix(simulation): address PR #75 review — vision components, triangle validation, FNV-1a, KG gating

1. CRITICAL: spawn_template_npcs now inserts NpcVisionState, NpcMemory,
   PlayerAwareness on template-spawned NPCs — matches spawn_npc() pattern
   from PR #66. Without these, template NPCs were invisible to vision and
   awareness systems.

2. WARNING: generate_intra_template_triangles now calls validate_triangle_def
   before generating TriangleState — mirrors cross-template path. Updates
   test TriangleDefs and logistics-hub.yaml to pass all three quality checks
   (conflict viability, relationship coherence, interest divergence).

3. WARNING: state_hash in compute_observer_snapshot now uses FNV-1a instead
   of DefaultHasher — consistent with D-010 principle 4 and the pattern in
   TemplateId/TriangleId. Updates golden file for new hash value.

4. WARNING: TriangleCrisisEventWire.role_assignments now filtered against
   observer KnowledgeGraph — unknown NPCs redacted from wire event per
   D-010 principle 2 (information boundaries).

5. WARNING: ActiveTemplateInstances::insert now despawns previous instance
   entities before overwriting — prevents orphaned ECS entities.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/data/templates/logistics-hub.yaml

@@ -171,9 +171,15 @@ triangles:
       - "ring-contact"
     conflict_type: AuthorityChallenge
     interest_axes:
-      - Relationships
+      - Want
       - Tolerance
       - Secret
+    relationship_constraints:
+      - with_role: "security-guard"
+        kind: Superior
+        required_trust:
+          min: 0
+          max: 5
 
 dialogue_pools:
   - location: "the-terminal"