fix(simulation): PR #66 review — dedup vision, spawn components, doc fixes

- vision.rs: deduplicate own-tile entity iteration, add same-tile test
- spawn.rs: add NpcVisionState, NpcMemory, PlayerAwareness to content-
  spawned NPCs (matching generate_npc)
- pressure.rs: update who_knows_full_scan doc to reflect actual call
  frequency, document O(N) acceptability at call site
- types.rs: fix stale protocol version comment (13→14)
- generate.rs: format!() → .to_string() (clippy)
- vision.rs: hardcoded 10 → TICKS_PER_GAME_MINUTE
- relationships.rs: fix comment "15%" → "20%" to match code
- pressure.rs: document total() floor-truncation
- save_state.rs: document NpcMemory exclusion as intentional

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

server/src/content/spawn.rs

@@ -205,6 +205,14 @@ fn spawn_npc(world: &mut World, profile: &types::NpcProfile, result: &mut SpawnR
     // TODO: CombatCapability — no content schema type exists yet. When combat content
     // is authored, add weapon_proficiency + combat_style mapping here.
 
+    // Vision + awareness components (#115, #244) — must match generate_npc().
+    // Without these, vision/awareness systems silently skip content-spawned NPCs.
+    entity_commands.insert((
+        npc::vision::NpcVisionState::default(),
+        npc::vision::NpcMemory::default(),
+        npc::awareness::PlayerAwareness::default(),
+    ));
+
     let entity = entity_commands.id();
 
     // Register in EntityRegistry for StableId mapping