township: 2-keyframe outcomes, referees, autogen, generation queue; favicons

Township tool (tools/gen_township_fighters.py):
- Outcome videos now generate TWO keyframes per outcome (finish + victory),
  each anchoring its own clip; victory clip uses a dedicated referee shot.
- Referee characters: new role on create form, kept out of fighter pools,
  dressed as officials, attachable per-match and used in victory keyframes.
- Per-match referee selection (new-match form + match editor, persisted).
- Autogenerate buttons on character/referee, environment and new-match forms
  (LLM-filled, editable before create) via /profile/autogen + /matches/autogen.
- Single-worker generation queue: all coderai-bound jobs (create/regen/train/
  match/process) are serialised and surfaced as "queued", with one persistent
  match-detail monitor replacing the competing per-job pollers (fixes the
  blinking progress when two jobs were launched at once).

coderai: favicon.ico served at /favicon.ico + linked in admin/login templates;
bundled township favicon served at /favicon.ico.

Also gitignore large packaging/runtime artifact dirs (.packaging-cache/, tmp/).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>