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/notification.ts

@@ -0,0 +1,50 @@
+import { z } from 'zod';
+
+export const notificationPrefsSchema = z.object({
+  email: z
+    .object({
+      assignment: z.boolean().default(true),
+      mention: z.boolean().default(true),
+      resolved: z.boolean().default(false),
+    })
+    .default({}),
+  inApp: z
+    .object({
+      assignment: z.boolean().default(true),
+      mention: z.boolean().default(true),
+      resolved: z.boolean().default(true),
+    })
+    .default({}),
+});
+
+export const markReadSchema = z.object({
+  ids: z.array(z.string().min(1)).optional(),
+  all: z.boolean().optional(),
+});
+
+export const createWebhookSchema = z.object({
+  name: z.string().min(1).max(80),
+  url: z.string().url(),
+  events: z.array(z.string().min(1)).min(1),
+  active: z.boolean().default(true),
+});
+
+export const updateWebhookSchema = z.object({
+  name: z.string().min(1).max(80).optional(),
+  url: z.string().url().optional(),
+  events: z.array(z.string().min(1)).min(1).optional(),
+  active: z.boolean().optional(),
+});
+
+export const WEBHOOK_EVENTS = [
+  'ticket.created',
+  'ticket.status_changed',
+  'ticket.assigned',
+  'ticket.resolved',
+  'comment.created',
+] as const;
+
+export type NotificationPrefs = z.infer<typeof notificationPrefsSchema>;
+export type CreateWebhookInput = z.infer<typeof createWebhookSchema>;
+export type UpdateWebhookInput = z.infer<typeof updateWebhookSchema>;
+export type WebhookEvent = (typeof WEBHOOK_EVENTS)[number];