Change ticket IDs from UUID to sequential integers

Backend:
- tickets.id: uuid → integer GENERATED ALWAYS AS IDENTITY
- transactions.ticket_id, custom_field_values.ticket_id: uuid → integer
- Routes convert string params to Number() for DB queries
- ScripEngine.prepare takes ticketId: number
- ActionPayload.ticketId: string → number

Frontend:
- Ticket.id: string → number, Transaction.ticket_id: string → number
- API functions accept number params
- formatTicketId() helper returns TKT-0001 format
- Ticket rows display TKT-XXXX, detail page uses formatTicketId

Migration: drops FKs, clears data, alters column types, re-adds FKs

src/routes/tickets.ts

@@ -61,7 +61,7 @@ export function createTicketsRouter(db: Db): Hono {
 
   // GET /:id — get ticket with custom field values
   router.get('/:id', async (c) => {
-    const id = c.req.param('id');
+    const id = Number(c.req.param('id'));
 
     const ticket = await db.query.tickets.findFirst({
       where: eq(tickets.id, id),
@@ -92,7 +92,7 @@ export function createTicketsRouter(db: Db): Hono {
 
   // PATCH /:id — update ticket
   router.patch('/:id', async (c) => {
-    const id = c.req.param('id');
+    const id = Number(c.req.param('id'));
     const body = await c.req.json();
     const parsed = UpdateTicketSchema.parse(body);
 
@@ -186,7 +186,7 @@ export function createTicketsRouter(db: Db): Hono {
 
   // POST /:id/preview — dry-run scrips
   router.post('/:id/preview', async (c) => {
-    const id = c.req.param('id');
+    const id = Number(c.req.param('id'));
     const body = await c.req.json();
     const parsed = UpdateTicketSchema.parse(body);
 
@@ -221,7 +221,7 @@ export function createTicketsRouter(db: Db): Hono {
 
   // GET /:id/transactions — list transactions for ticket
   router.get('/:id/transactions', async (c) => {
-    const id = c.req.param('id');
+    const id = Number(c.req.param('id'));
 
     const result = await db.query.transactions.findMany({
       where: eq(transactions.ticket_id, id),