feat: add infrastructure foundation — scripts, schema key, new routes, model fields

- Add npm scripts for dev, migrate, seed, smoke
- Add key column to scrips table (unique short identifier)
- Register users and templates routes in server
- Set development: false in Bun.serve for production mode
- Add description and custom_fields to CreateTicketSchema
- Make owner_id nullable/optional for unassigned tickets
- Add migration for custom field key column

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/models/ticket.ts

@@ -7,12 +7,14 @@ export type Ticket = InferSelectModel<typeof tickets>;
 export const CreateTicketSchema = z.object({
   subject: z.string().min(1),
   queue_id: z.string().uuid(),
+  description: z.string().trim().optional(),
+  custom_fields: z.record(z.string(), z.string()).optional(),
 });
 
 export const UpdateTicketSchema = z.object({
   subject: z.string().min(1).optional(),
   status: z.string().min(1).optional(),
-  owner_id: z.string().uuid().optional(),
+  owner_id: z.string().uuid().nullable().optional(),
 });
 
 export const CommentSchema = z.object({