Patch: Migrate bypasser to pure CDP + Misc fixes (#575)

Bypasser:
- Refactored internal bypasser logic to use SeleniumBase Pure CDP mode,
removed chromedriver dependencies and UC code.
- Added dedicated threading for internal bypasser functions, fixes any
potential asyncio CPU spike behavior
- Fixed WebGL issue with Chromium 144. Reverted 1.0.3 hotfix and updated
to latest Chromium

Misc: 
- Added M4A color mapping
- Fix frontend language filtering with multi-language releases
- Added "days" age for usenet/torrent releases
- Improved entrypoint chown efficiency
- Added `ONBOARDING` env variable, default true

scripts/generate_env_docs.py

@@ -178,6 +178,12 @@ def _generate_bootstrap_env_docs() -> List[str]:
             "type": "boolean",
             "default": "false",
         },
+        {
+            "name": "ONBOARDING",
+            "description": "Show the onboarding wizard on first run. Set to false to skip (useful for ephemeral storage).",
+            "type": "boolean",
+            "default": "true",
+        },
     ]
 
     lines = [