feat(rust): NPC profile and placement routes, the event picker, triggers and titles (runicnpc stage 4)

Admin: /admin/rust/npcs for profiles (create, change, delete, restore a
replaced one, push now) and each server's placements (list, add from a map
point, change, remove, rename, respawn). Public: the profiles a leaderboard
ranks by, one profile's ranking counted as the profile says (D247, D250), and
one player's kills by profile (D252). Player: your own kills by profile.

The Place NPCs step offers the site's profiles first, then Rust's own
(D243). rust.npc.died and rust.npc.health are triggers a phase can wait on.
A title rule can rank a profile's kills. Swagger fragment, engagement and
route manifests regenerated.

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

server/test/identityRoutes.test.js

@@ -48,6 +48,8 @@ test('the player tier serves the identity routes, the entitlement read, and noth
       'GET /links',
       // Phase 8: what the site has given the caller in game. Read-only on this
       // tier by construction — the authoring routes are all admin.
+      // RunicNPC stage 4 (D252): the caller's own kills of each NPC profile. Read-only.
+      'GET /npc-kills',
       'GET /permissions',
       'GET /servers',
       'POST /link',