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/findFirstUser.schema.ts

@@ -42,6 +42,7 @@ export const UserFindFirstSelectSchema: z.ZodType<Prisma.UserSelect> = z.object(
     insuranceContacts: z.boolean().optional(),
     patientConversations: z.boolean().optional(),
     labRxTemplates: z.boolean().optional(),
+    seleniumSettings: z.boolean().optional(),
     _count: z.boolean().optional()
   }).strict() as unknown as z.ZodType<Prisma.UserSelect>;
 
@@ -78,6 +79,7 @@ export const UserFindFirstSelectZodSchema = z.object({
     insuranceContacts: z.boolean().optional(),
     patientConversations: z.boolean().optional(),
     labRxTemplates: z.boolean().optional(),
+    seleniumSettings: z.boolean().optional(),
     _count: z.boolean().optional()
   }).strict();