feat(rust): Guarded Crate — feed, map, Warden, Place a guarded crate (PLAN_REDESIGNS §14.3.5)

Stage 6 of the §14.3 integration plan, on protocol 14. Spec: docs
rust-link/PROTOCOL.md §20.9.

- gc.started and gc.ended public, gc.failed staff's; guardedCrate.js reads
  each row per viewer (the clearer's name for the presence audience, Steam id,
  position and key for staff, `won` for everyone).
- Triggers rust.gc.started and rust.gc.ended (a crate a player cleared only).
- The step rust.gc.place: an event from rust.options.gc_events and a world
  call's location; refused at verify for Guarded Crate absent, NpcSpawn missing
  (D364), console unavailable, or an unknown event. Kept (D373); the run log's
  success line says so (D380). Budget rust.gc.crates.
- Warden (D375): guarded_won, title category guardedwon, Crates cleared column.
- Map marker, server settings line, swagger, engagement manifest, bundle, README.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

server/test/titleConditions.test.js

@@ -47,8 +47,9 @@ const item = (kind, over = {}) => ({ id: 1, t: 1, kind, frame: frame({ kind, ...
 
 // ── The categories ────────────────────────────────────────────────────────
 
-test('twenty-seven categories carry a default title, and playtime carries none (D172, §11.2.2, D356, D375)', () => {
-  assert.strictEqual(titles.CATEGORY_IDS.length, 27)
+test('twenty-eight categories carry a default title, and playtime carries none (D172, §11.2.2, D356, D375)', () => {
+  assert.strictEqual(titles.CATEGORY_IDS.length, 28)
+  assert.strictEqual(titles.STATS.guardedwon.title, 'Warden')
   assert.strictEqual(titles.STATS.treasureswon.title, 'Treasure Hunter')
   assert.strictEqual(titles.STATS.richest.title, 'Magnate')
   assert.strictEqual(titles.STATS.crateshacked.title, 'Safecracker')