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/variants/input/ServiceLineTransaction.input.ts

@@ -0,0 +1,20 @@
+import * as z from 'zod';
+import { PaymentMethodSchema } from '../../enums/PaymentMethod.schema';
+// prettier-ignore
+export const ServiceLineTransactionInputSchema = z.object({
+    id: z.number().int(),
+    paymentId: z.number().int(),
+    serviceLineId: z.number().int(),
+    transactionId: z.string().optional().nullable(),
+    paidAmount: z.number(),
+    adjustedAmount: z.number(),
+    method: PaymentMethodSchema,
+    receivedDate: z.date(),
+    payerName: z.string().optional().nullable(),
+    notes: z.string().optional().nullable(),
+    createdAt: z.date(),
+    payment: z.unknown(),
+    serviceLine: z.unknown()
+}).strict();
+
+export type ServiceLineTransactionInputType = z.infer<typeof ServiceLineTransactionInputSchema>;