feat: THE CREATOR god-tier character, bitcoin choreographies, omni-morph, cameos

- Guy Fawkes mask archetype with golden outline, bitcoin chest symbol, laptop, tier-gated effects
- 12 custom bitcoin-themed choreographies (8 regular + 4 exclusive ultimates)
- Omni-morph system: creator morphs into any of 80+ archetypes instead of cycling 3
- 6% per-round cameo in non-creator fights — drops golden ₿ gifts to fighters
- Custom golden code rain entrance with persistent orbiting particles
- pickChoreography: 50% ultimate chance (100% on crits), all tier ultimates + 4 exclusive
- Server auto-assigns the_creator archetype on login/register for creator pubkey
- FightViewer, payments, queue, orchestrator improvements

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

server/src/engine/customization.ts

@@ -17,7 +17,7 @@ const VALID_ARCHETYPES = new Set([
   'hamster', 'sock_puppet', 'traffic_cone', 'toilet_man', 'potato',
   'cloud_man', 'rock_man', 'balloon_man', 'trash_can', 'rubber_duck',
   'snowman', 'scarecrow', 'jack_o_lantern', 'garden_gnome', 'lamp_post',
-  'broom_man', 'human',
+  'broom_man', 'human', 'the_creator',
 ])
 
 const HEX_COLOR_RE = /^#[0-9a-fA-F]{6}$/