feat: add RemoveBrokers tRPC router, service layer, broker registry, and removal engine

- Create Valibot schemas for removal request CRUD, scan, and listing filters
- Implement broker registry with 48 major data brokers and removal metadata
- Build removal engine with automated, form, email, and status tracking support
- Add service layer with subscription-scoped operations: create/get/scan/stats/process
- Wire removebrokers router into root app router
- Write 20 passing unit tests (router + service layer)

web/src/server/api/schemas/removebrokers.ts

@@ -0,0 +1,37 @@
+import { object, string, minLength, optional, number, picklist } from "valibot";
+
+export const PersonalInfoSchema = object({
+  fullName: string([minLength(1)]),
+  email: optional(string()),
+  phone: optional(string()),
+  address: optional(string()),
+  city: optional(string()),
+  state: optional(string()),
+  zip: optional(string()),
+  dob: optional(string()),
+});
+
+export const CreateRemovalRequestSchema = object({
+  brokerId: string([minLength(1)]),
+  personalInfo: PersonalInfoSchema,
+});
+
+export const RequestStatusSchema = object({
+  requestId: string([minLength(1)]),
+});
+
+export const ScanListingsSchema = object({
+  brokerId: optional(string()),
+});
+
+export const BrokerListingsFilterSchema = object({
+  brokerId: optional(string()),
+  page: optional(number(), 1),
+  limit: optional(number(), 20),
+});
+
+export const RemovalRequestsFilterSchema = object({
+  status: optional(picklist(["PENDING", "SUBMITTED", "IN_PROGRESS", "COMPLETED", "FAILED", "REJECTED", "CANCELLED"])),
+  page: optional(number(), 1),
+  limit: optional(number(), 20),
+});