feat: split Repairs into FM, Repair, and Custody workflows

The old Repairs module had grown ticketing-system features (status lifecycle,
comments, assignee, notes) that duplicate what the external ticketing tool
already owns. Vector only needs to track whether maintenance is open or closed.

- Rename RepairJob -> Fm (OPEN/CLOSED only), drop RepairComment, assignee, notes
- New Repair table: persistent log of physical part swaps, with ingest on
  unknown broken MPN via partModels.upsertByMpn
- New custody model: PENDING_DROP_IN_CUSTODY / PENDING_DESTRUCTION_IN_CUSTODY
  states + Part.custodianId, with a "My Custody" page for drop-off
- PartModel.destroyOnFail routes broken parts to the destruction path
- Host lookup on /fms and /repairs accepts hostId XOR assetId
- Wire the dormant webhook emitter: fm.opened, fm.closed, repair.logged
- Single fresh Prisma migration (dev DB was wiped, no backfill)

Tests: 60 passing (custody transitions in parts.test.ts; new fms.test.ts,
repairs.test.ts, custody.test.ts covering happy paths, validation failures,
webhook emissions, and ingest-on-unknown-MPN).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/web/src/lib/queryKeys.ts

@@ -49,12 +49,22 @@ export const queryKeys = {
     detail: (id: string) => [...queryKeys.hosts.all, 'detail', id] as const,
     deployedParts: (id: string) => [...queryKeys.hosts.all, 'deployed-parts', id] as const,
   },
+  fms: {
+    all: ['fms'] as const,
+    list: (filters?: Record<string, unknown>) =>
+      [...queryKeys.fms.all, 'list', filters ?? {}] as const,
+    detail: (id: string) => [...queryKeys.fms.all, 'detail', id] as const,
+  },
   repairs: {
     all: ['repairs'] as const,
     list: (filters?: Record<string, unknown>) =>
       [...queryKeys.repairs.all, 'list', filters ?? {}] as const,
     detail: (id: string) => [...queryKeys.repairs.all, 'detail', id] as const,
-    comments: (id: string) => [...queryKeys.repairs.all, 'comments', id] as const,
+  },
+  custody: {
+    all: ['custody'] as const,
+    mine: (filters?: Record<string, unknown>) =>
+      [...queryKeys.custody.all, 'mine', filters ?? {}] as const,
   },
   partModels: {
     all: ['part-models'] as const,