feat: add Zenith strategy and move latency tracing

- Register Zenith 1.1 with balanced duel verdicts and forced-outcome overrides.
- Prioritize permanent-trail space in Constrictor and health-aware hazard routes.
- Deduct executor queue delays and return fallback directions on move timeouts.
- Correlate response headers, replay timings, and sampled structured trace logs.
- Move shared metrics publication off the response path without losing local counts.
- Allow configurable tournament opponents and add a psql helper recipe.
- Preserve empty latency values through compact replay encoding and migration.
- Update Arena game links and use default assets for missing customizations.
- Cover strategy, HTTP lifecycle, tracing, replay codecs, and dashboard behavior.
- Validate with 260 passing Python tests, 4 skips, and 2 passing JavaScript tests.

server/metrics/MetricsCollector.py

@@ -67,7 +67,8 @@ class MetricsCollector:
     self._metrics['games_autocreated'] += 1
     await self._auto_publish()
 
-  async def record_move(self, direction:str, elapsed_ms:float) -> None:
+  def record_move_local(self, direction:str, elapsed_ms:float) -> None:
+    """Update counters without waiting for a shared metrics backend."""
     self._metrics['total_moves'] += 1
     self._metrics['move_response_time_ms_total'] += elapsed_ms
     self._metrics['move_response_time_ms_max'] = max(
@@ -80,6 +81,12 @@ class MetricsCollector:
     # else:
     #   move_counts['unknown'] += 1
     # self._metrics['last_move_unix'] = int(time.time())
+
+  async def record_move(self, direction:str, elapsed_ms:float) -> None:
+    self.record_move_local(direction, elapsed_ms)
+    await self._auto_publish()
+
+  async def publish_move_metrics(self) -> None:
     await self._auto_publish()
 
   async def record_game_end(self, game_state:dict) -> None: