feat(sim): add pytest timeout(300) and tier_usage Stage 9 check

Task 2.3: prevent infinite CI hangs with 300s hard timeout
Task 3.2: non-blocking Stage 9 logs mma_tier_usage after Tier 3 completes

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

tests/visual_sim_mma_v2.py

@@ -47,6 +47,7 @@ def _poll(client: ApiHookClient, timeout: int, condition, label: str) -> tuple[b
 # ---------------------------------------------------------------------------
 
 @pytest.mark.integration
+@pytest.mark.timeout(300)
 def test_mma_complete_lifecycle(live_gui) -> None:
     """
     End-to-end MMA lifecycle using real Gemini API (gemini-2.5-flash-lite).
@@ -168,4 +169,21 @@ def test_mma_complete_lifecycle(live_gui) -> None:
 
     tier3_content = streams[tier3_keys[0]]
     print(f"[SIM] Tier 3 output ({len(tier3_content)} chars): {tier3_content[:100]}...")
+
+    # ------------------------------------------------------------------
+    # Stage 9: Wait for mma_status == 'done' and mma_tier_usage Tier 3 non-zero
+    # ------------------------------------------------------------------
+    def _tier3_usage_nonzero(s):
+     usage = s.get('mma_tier_usage', {})
+     t3 = usage.get('Tier 3', {})
+     return t3.get('input', 0) > 0 or t3.get('output', 0) > 0
+
+    ok, status = _poll(client, timeout=30, label="wait-tier3-usage",
+                       condition=_tier3_usage_nonzero)
+    # Non-blocking: if tier_usage isn't wired yet, just log and continue
+    tier_usage = status.get('mma_tier_usage', {})
+    print(f"[SIM] Tier usage: {tier_usage}")
+    if not ok:
+     print("[SIM] WARNING: mma_tier_usage Tier 3 still zero after 30s — may not be wired to hook API yet")
+
     print("[SIM] MMA complete lifecycle simulation PASSED.")