feat(rust): permissions as event rewards — lend or give any registered permission (PLAN_REDESIGNS §12)

D342-D346 (docs#342). Two steps over the permission mirror's own tables, so
no plugin, sidecar or protocol change:

- rust.perm.lend, "Permissions until the event ends": a kit reward's lease,
  one rust_perm_run_grants row per recipient per permission, the message on
  one row each; change/ledger with rust.kit.entitle's revert and reconcile;
  budget rust.permissions.
- rust.perm.give, "Permissions for good": a standing rust_perm_grants row per
  website user per permission, scoped to the step's server, source `event`,
  note "event run <run>, step <step>"; a grant already there is left alone,
  and a retry's own grants are counted as given; the message rides a
  notice-only run-grant row; irreversible/none; budget rust.permissions.kept.
- Both: several permissions through core's `multiple` param (MODULE_API
  1.14.0, at most 10); a required "I am sure" toggle refused unticked in the
  dry run and at run time, naming the permissions (D343); a permission the
  server's catalogue lacks refused by name; a blank message tells nobody.
- rust.options.permissions: the enabled servers' catalogues, grouped by the
  registering plugin (by prefix when none), sorted plugin then permission
  without case, a row noted "Only on X" when not on every server.
- Permission manager: an event-given grant shows "given by event run N,
  step M"; staff turn it off like any grant.
- coreApi ^1.14.0; ci/core-ref.json pinned to website#213's head until it
  merges; engagement-triggers.json regenerated; routes.manifest.json
  unchanged (no new routes).

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

server/model/permissions/permissions.model.js

@@ -342,8 +342,11 @@ function buildDesired(serverId, authored) {
     const permission = normaliseName(row.permission)
     if (!permission) continue
 
+    // A grant an event gave for good (PLAN_REDESIGNS.md §12.5) says so, with its
+    // note, so the screen can show where it came from; staff delete it like any.
+    const given = row.source === 'event' ? { origin: 'event', note: row.note || '' } : {}
     for (const steamId of steamIdsByUser.get(row.userId) || []) {
-      addGrant(steamId, permission, { type: 'userGrant', id: row.id, userId: row.userId, scope: row.scope })
+      addGrant(steamId, permission, { type: 'userGrant', id: row.id, userId: row.userId, scope: row.scope, ...given })
     }
   }