fix: resolve NameError on startup, move analyses into recordings, remap port to 8050

- web.py: Python class bodies can't close over a name they also assign;
  use a temporary alias _analyses_dir to break the self-reference
- docker-compose.yml: mount ./recordings/analyses:/recordings/analyses
  instead of a separate ./analyses volume so cache lives inside recordings;
  remove --analyses-dir flag (default now resolves correctly); remap
  external port 8080→8050 for reverse proxy
- README.md / CLAUDE.md: update Docker port references to 8050

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web.py

@@ -1656,9 +1656,10 @@ def main():
 
     prune_orphan_analyses(analyses_dir, rec_dir)
 
+    _analyses_dir = analyses_dir  # class body can't close over a name it also assigns
     class Handler(_Handler):
         recordings_dir = str(rec_dir)
-        analyses_dir   = str(analyses_dir)
+        analyses_dir   = str(_analyses_dir)
         threshold      = args.threshold
         min_gap        = args.min_gap