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/catalogue.js

@@ -76,6 +76,12 @@ const PUBLIC_KINDS = Object.freeze([
   // for the presence audience, Steam ids and the position only for staff.
   'dt.started',
   'dt.won',
+  // Protocol 14: a guarded crate landed, and was cleared (PLAN_REDESIGNS
+  // §14.3.5). Public as kinds, read per viewer by `guardedCrate.shapeFor` as a
+  // treasure is: the clearer's name only for the presence audience, the Steam id
+  // and the position only for staff.
+  'gc.started',
+  'gc.ended',
 ])
 
 /**
@@ -144,6 +150,9 @@ const STAFF_KINDS = Object.freeze([
   // Protocol 14 (§14.3.4): a Dangerous Treasures event ended, won or not. The
   // plan keeps it staff's; the map shows the chest go.
   'dt.ended',
+  // Protocol 14 (§14.3.5): a guarded crate timed out with guards still standing.
+  // The plan keeps it staff's; the map shows the crate go.
+  'gc.failed',
 ])
 
 /**