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/api/src/services/analytics.test.ts

@@ -14,7 +14,7 @@ function makeTx(args: {
     createdAt: Date;
     partModelId: string;
   }[];
-  openRepairs: number;
+  openFms: number;
   eolPartModels: {
     id: string;
     mpn: string;
@@ -35,8 +35,8 @@ function makeTx(args: {
         })),
       findMany: async () => args.parts,
     },
-    repairJob: {
-      count: async () => args.openRepairs,
+    fm: {
+      count: async () => args.openFms,
     },
     partModel: {
       findMany: async () => args.eolPartModels,
@@ -52,7 +52,7 @@ const now = new Date('2026-04-16T00:00:00.000Z');
 const daysAgo = (n: number) => new Date(now.getTime() - n * 24 * 60 * 60 * 1000);
 
 describe('analytics.dashboard', () => {
-  it('aggregates totals, state counts and open repairs', async () => {
+  it('aggregates totals, state counts and open FMs', async () => {
     const tx = makeTx({
       partCount: 5,
       stateRows: [
@@ -60,14 +60,14 @@ describe('analytics.dashboard', () => {
         { state: 'DEPLOYED', count: 2, totalPrice: 8000 },
       ],
       parts: [],
-      openRepairs: 4,
+      openFms: 4,
       eolPartModels: [],
       bins: [],
     });
 
     const r = await dashboard(tx);
     expect(r.totalParts).toBe(5);
-    expect(r.openRepairs).toBe(4);
+    expect(r.openFms).toBe(4);
     expect(r.byState).toEqual([
       { state: 'SPARE', count: 3, totalPrice: 1500 },
       { state: 'DEPLOYED', count: 2, totalPrice: 8000 },
@@ -84,7 +84,7 @@ describe('analytics.dashboard', () => {
         { id: 'p3', state: 'SPARE', binId: null, createdAt: daysAgo(400), partModelId: 'pm' },
         { id: 'p4', state: 'SPARE', binId: null, createdAt: daysAgo(900), partModelId: 'pm' },
       ],
-      openRepairs: 0,
+      openFms: 0,
       eolPartModels: [],
       bins: [],
     });
@@ -109,7 +109,7 @@ describe('analytics.dashboard', () => {
         { id: '3', state: 'SPARE', binId: 'b2', createdAt: daysAgo(1), partModelId: 'pm' },
         { id: '4', state: 'SPARE', binId: null, createdAt: daysAgo(1), partModelId: 'pm' },
       ],
-      openRepairs: 0,
+      openFms: 0,
       eolPartModels: [],
       bins: [
         { id: 'b1', name: 'A1', room: { name: 'Lab', site: { name: 'HQ' } } },
@@ -133,7 +133,7 @@ describe('analytics.dashboard', () => {
         { id: '2', state: 'DEPLOYED', binId: null, createdAt: daysAgo(1), partModelId: 'pm1' },
         { id: '3', state: 'DEPLOYED', binId: null, createdAt: daysAgo(1), partModelId: 'pm2' },
       ],
-      openRepairs: 0,
+      openFms: 0,
       eolPartModels: [
         {
           id: 'pm1',