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.

tests/test_DashboardStaticAssets.py

@@ -16,6 +16,22 @@ class TestDashboardStaticAssets(unittest.IsolatedAsyncioTestCase):
       gameplay_db_enabled=False,
     )
 
+  async def test_dashboard_uses_arena_game_url(self):
+    from unittest.mock import patch
+    with patch.dict(os.environ, {}, clear=True):
+      response = await self.server.app.test_client().get('/dashboard')
+    self.assertEqual(response.status_code, 200)
+    html = await response.get_data(as_text=True)
+    self.assertIn('https://arena.battlesnake.com/games', html)
+    self.assertNotIn('https://play.battlesnake.com/game', html)
+
+  def test_gameboard_uses_arena_game_url(self):
+    from types import SimpleNamespace
+    from server.GameBoard import GameBoard
+    game = SimpleNamespace(id='example-game')
+    self.assertEqual(GameBoard._get_game_url(game, False), 'https://arena.battlesnake.com/games/example-game')
+    self.assertIsNone(GameBoard._get_game_url(game, True))
+
   def _static_url(self):
     return self.server.app.jinja_env.globals['static_url']