Phase 2a: Prisma schema + shared schemas for v1.0 features

- New models: Attachment, Webhook, Notification, SavedView
- New fields: User.notificationPrefs (Json), indexes on Ticket
- post-push.sql manages the tsvector columns + GIN indexes + triggers for
  FTS on Ticket (title/overview/displayId) and Comment (body); Prisma can't
  express these
- package.json scripts: db:push and start:prod now chain `prisma db execute`
  against post-push.sql after `prisma db push`
- db:migrate script removed — project uses push workflow, not migrations
- Shared Zod schemas: attachment (25MB limit + mimetype allowlist), savedView,
  notification (prefs, mark-read, webhook CRUD)
- Shared type additions: Attachment, Notification, SavedView, Webhook,
  PaginatedResponse<T>
- Test fixtures updated for the new User.notificationPrefs column

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

shared/schemas/ticket.ts

@@ -22,5 +22,28 @@ export const updateTicketSchema = z.object({
   assigneeId: z.string().nullable().optional(),
 });
 
+export const bulkActionSchema = z.discriminatedUnion('action', [
+  z.object({
+    action: z.literal('reassign'),
+    ids: z.array(z.string().min(1)).min(1).max(500),
+    value: z.string().nullable(),
+  }),
+  z.object({
+    action: z.literal('close'),
+    ids: z.array(z.string().min(1)).min(1).max(500),
+  }),
+  z.object({
+    action: z.literal('setSeverity'),
+    ids: z.array(z.string().min(1)).min(1).max(500),
+    value: severitySchema,
+  }),
+  z.object({
+    action: z.literal('setStatus'),
+    ids: z.array(z.string().min(1)).min(1).max(500),
+    value: ticketStatusSchema,
+  }),
+]);
+
 export type CreateTicketInput = z.infer<typeof createTicketSchema>;
 export type UpdateTicketInput = z.infer<typeof updateTicketSchema>;
+export type BulkActionInput = z.infer<typeof bulkActionSchema>;