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.

snakes/__init__.py

@@ -10,7 +10,7 @@ SNAKE_REGISTRATIONS = {
   "TemplateSnake": SnakeRegistration("snakes.core.template", "1.0.0"),
   "ApexBattleSnake": SnakeRegistration("snakes.strategies.apex", "1.0.0"),
   "PrismBattleSnake_GPT_5_6_Sol": SnakeRegistration(
-    "snakes.strategies.prism", "1.4.0"
+    "snakes.strategies.prism", "1.5.0"
   ),
   "DummSnake": SnakeRegistration("snakes.legacy.DummSnake", "1.0.0"),
   "LogicSnake": SnakeRegistration("snakes.legacy.LogicSnake", "1.1.0"),