feat: add Lab RX feature with template management and auto-seed defaults

- New lab_rx_template table with sortOrder and Prisma migrations
- Backend CRUD + reorder routes at /api/lab-rx/templates
- Auto-seeds 3 Highland Dental Studio defaults on first use per user
- LabRxModal: template picker, inline rename, up/down reorder, full
  template form with sections (Template Name / Lab Info / Case Details)
- RX popup: Tooth Number, Shade, Due Date, Doctor (from NPI providers),
  Instructions pre-filled with "Please make / Thank you!", print output
- lab-rx-templates.ts config file for future git-managed additions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/shared/schemas/enums/LabRxTemplateScalarFieldEnum.schema.ts

@@ -0,0 +1,5 @@
+import * as z from 'zod';
+
+export const LabRxTemplateScalarFieldEnumSchema = z.enum(['id', 'userId', 'name', 'labName', 'labPhone', 'labFax', 'labAddress', 'labAccount', 'caseType', 'material', 'instructions', 'doctorName', 'sortOrder', 'createdAt', 'updatedAt'])
+
+export type LabRxTemplateScalarFieldEnum = z.infer<typeof LabRxTemplateScalarFieldEnumSchema>;