feat: add live replays and PostgreSQL maintenance tools

- Stream compact live replay updates across local and clustered dashboards.
- Render responsive snake bodies as SVG paths with aligned custom icons.
- Add cache-busted assets, replay fallback routes, and live-follow playback.
- Support PostgreSQL benchmark sampling and idempotent SQLite migration.
- Add dry-run cleanup for old low-quality PostgreSQL replay payloads.
- Reward safe perimeter lanes and bump Prism to version 1.5.0.
- Add backend, migration, dashboard, and perimeter regression coverage.

server/Server.py

@@ -13,8 +13,8 @@ from server.metrics import (
   MetricsCollector,
 )
 
-import asyncio, signal, logging, os, re, time
-from quart import Quart
+import asyncio, signal, logging, time, os, re
+from quart import Quart, url_for
 
 from server.blueprints import (
   create_battlesnake_blueprint,
@@ -110,6 +110,17 @@ class Server:
     self.app.register_blueprint(create_metrics_blueprint(self))
     self.app.register_blueprint(create_dashboard_blueprint(self))
 
+    @self.app.template_global()
+    def static_url(filename:str) -> str:
+      # Static assets are served with a long max-age, so the URL carries the
+      # file mtime to make browsers pick up dashboard changes immediately.
+      static_root = self.app.static_folder or ''
+      try:
+        version = int(os.path.getmtime(os.path.join(static_root, filename)))
+      except OSError:
+        version = 0
+      return f'{url_for("static", filename=filename)}?v={version}'
+
     @self.app.after_request
     async def identify_server(response):
       response.headers.set('server', 'battlesnake/gitea/snake-python')
@@ -185,5 +196,7 @@ class Server:
     storage = StorageLoader.build(self.storage_type)
     return storage.cleanup()
 
-  async def _on_dashboard_games_update_notice(self, trigger:str) -> None:
-    await self.dashboard_query.on_dashboard_games_update_notice(trigger)
+  async def _on_dashboard_games_update_notice(
+    self, trigger:str, game_id:str|None=None,
+  ) -> None:
+    await self.dashboard_query.on_dashboard_games_update_notice(trigger, game_id)