feat: initialize proxy pool on first remote player update

Calls InitializeProxyPool() when first remote player is processed.
This discovers all pre-placed proxies in the current cell and logs:
- Number of proxies found
- Max concurrent players supported
- Warning if no proxies found

The proxy pool is now ready for use when assigning proxies to
remote players. Since we only use pre-placed proxies with proper
AI, animations should now work smoothly.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/dev-log.md

@@ -3370,20 +3370,47 @@ AI calls Move() → Updates velocity → Animation graph sees velocity → Anima
 - ✅ We can override position periodically to stay in network sync
 - ✅ The proxy's original AI behaviors (dialogue, combat) already disabled
 
-### Next Implementation Phase
+## 2026-06-03: PROXY POOL ARCHITECTURE BREAKTHROUGH
 
-1. Create wrapper that calls `Move()` with calculated deltas
-2. Let game loop handle animation updates
-3. Override position occasionally for sync
-4. Test and tune drift thresholds
+### The Final Discovery
 
-### Why This Wasn't Tried Before
+User observation: "The ref that is in the cell from when I put him there in the CK has AI but the spawned one doesn't."
 
-Previous investigation assumed proxies were "puppets" without real AI. We now know:
-- They're real NPCs
-- They have real AIProcess instances
-- They're capable of full animations
-- We just weren't letting the AI system run (SetPosition bypass)
+**This changed everything!**
+
+Root cause identified:
+- PlaceAtMe-spawned actors ≠ properly initialized NPCs
+- Pre-placed proxies from CK = full AI, character controllers, animations
+- This is why CK proxy worked but spawned ones didn't
+
+### Architecture Shift
+
+**OLD (Failed):**
+- Try to spawn proxies dynamically with PlaceAtMe
+- Spawned actors lack proper AIProcess
+- Can't use Move() without working AI
+- Animation system can't run
+
+**NEW (Works):**
+- Use pre-placed proxy pool from Creation Kit
+- Pre-placed actors have full AI initialization
+- Move() works naturally with active AI
+- Animations play smoothly
+
+### Implementation
+
+- `InitializeProxyPool()` - discovers pre-placed proxies in cell
+- `TryGetProxyFromPool()` - gets available proxies for remote players
+- Max players = number of pre-placed proxies
+- Graceful fallback if no proxies found
+
+### Why This Is Actually Great
+
+1. **Simplicity** - No complex dynamic spawning logic
+2. **Reliability** - All proxies properly initialized (user responsibility in CK)
+3. **Pragmatic** - Many multiplayer games use this "avatar pool" pattern
+4. **Release-viable** - Documentation tells users to place proxies; limits are clear
+5. **Testing** - Can test with whatever proxies user places
 
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