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/savedView.ts

@@ -0,0 +1,28 @@
+import { z } from 'zod';
+
+export const savedViewFiltersSchema = z
+  .object({
+    status: z.string().optional(),
+    severity: z.number().optional(),
+    assigneeId: z.string().optional(),
+    createdById: z.string().optional(),
+    categoryId: z.string().optional(),
+    typeId: z.string().optional(),
+    itemId: z.string().optional(),
+    search: z.string().optional(),
+  })
+  .passthrough();
+
+export const createSavedViewSchema = z.object({
+  name: z.string().min(1).max(80),
+  filters: savedViewFiltersSchema,
+});
+
+export const updateSavedViewSchema = z.object({
+  name: z.string().min(1).max(80).optional(),
+  filters: savedViewFiltersSchema.optional(),
+});
+
+export type CreateSavedViewInput = z.infer<typeof createSavedViewSchema>;
+export type UpdateSavedViewInput = z.infer<typeof updateSavedViewSchema>;
+export type SavedViewFilters = z.infer<typeof savedViewFiltersSchema>;