feat: add Selenium Settings page to configure paymentGroupId per office

Adds a new Settings → Advanced → Selenium Settings page where the office
name (paymentGroupId) used in United/DentalHub portal dropdowns can be
configured without touching code. Previously hardcoded as "Summit Dental
Care"; now injected from DB into the three United workers at job dispatch.

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

packages/db/shared/schemas/results/LabRxTemplateFindFirstResult.schema.ts

@@ -0,0 +1,18 @@
+import * as z from 'zod';
+export const LabRxTemplateFindFirstResultSchema = z.nullable(z.object({
+  id: z.number().int(),
+  userId: z.number().int(),
+  name: z.string(),
+  labName: z.string().optional(),
+  labPhone: z.string().optional(),
+  labFax: z.string().optional(),
+  labAddress: z.string().optional(),
+  labAccount: z.string().optional(),
+  caseType: z.string().optional(),
+  material: z.string().optional(),
+  instructions: z.string().optional(),
+  sortOrder: z.number().int(),
+  createdAt: z.date(),
+  updatedAt: z.date(),
+  user: z.unknown()
+}));