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>

packages/shared/src/enums.ts

@@ -1,6 +1,13 @@
 import { z } from 'zod';
 
-export const PartState = z.enum(['SPARE', 'DEPLOYED', 'BROKEN', 'PENDING_DESTRUCTION']);
+export const PartState = z.enum([
+  'SPARE',
+  'DEPLOYED',
+  'BROKEN',
+  'PENDING_DESTRUCTION',
+  'PENDING_DROP_IN_CUSTODY',
+  'PENDING_DESTRUCTION_IN_CUSTODY',
+]);
 export type PartState = z.infer<typeof PartState>;
 
 export const Role = z.enum(['ADMIN', 'TECHNICIAN']);
@@ -11,17 +18,16 @@ export const PartEventType = z.enum([
   'STATE_CHANGED',
   'LOCATION_CHANGED',
   'FIELD_UPDATED',
-  'REPAIR_STARTED',
-  'REPAIR_COMPLETED',
-  'REPAIR_CANCELLED',
-  'REPAIR_COMMENTED',
+  'FM_OPENED',
+  'FM_CLOSED',
+  'PART_SWAPPED',
   'TAG_ADDED',
   'TAG_REMOVED',
 ]);
 export type PartEventType = z.infer<typeof PartEventType>;
 
-export const RepairStatus = z.enum(['PENDING', 'IN_PROGRESS', 'COMPLETED', 'CANCELLED']);
-export type RepairStatus = z.infer<typeof RepairStatus>;
+export const FmStatus = z.enum(['OPEN', 'CLOSED']);
+export type FmStatus = z.infer<typeof FmStatus>;
 
 export const CsvImportStatus = z.enum([
   'PENDING',
@@ -39,9 +45,9 @@ export const WebhookEventName = z.enum([
   'part.deleted',
   'part.state_changed',
   'part.location_changed',
-  'repair.started',
-  'repair.completed',
-  'repair.cancelled',
+  'fm.opened',
+  'fm.closed',
+  'repair.logged',
   'tag.assigned',
   'tag.removed',
 ]);