Add Info Broker Removal service (FRE-5402)

New service for helping clients remove personal listings from data broker sites.

Service features:
- BrokerRegistry: Catalog of 20+ data brokers with removal methods
- RemoveBrokersService: Core service for scanning, creating removal requests,
  submitting removals, and verifying completions
- RemoveBrokersScheduler: Automated processing of pending removals and
  verification of completed removals
- BrokerAlertPipeline: Alert integration for listing discoveries and removal status

API endpoints (/removebrokers):
- GET /brokers - List available data brokers
- GET /status - Get removal request status and stats
- POST /scan - Scan for personal listings across brokers
- POST /request - Create a new removal request
- GET /request/:id - Get specific removal request details
- DELETE /request/:id - Cancel a removal request
- POST /process - Trigger processing of pending removals
- POST /verify/:id - Manually verify a removal completion

DB models: InfoBroker, RemovalRequest, BrokerListing
Types: BrokerStatus, RemovalStatus, RemovalMethod, and related interfaces

services/removebrokers/test/brokerRegistry.test.ts

@@ -0,0 +1,36 @@
+import { describe, it, expect } from "vitest";
+import { BROKER_REGISTRY, getBrokerById, getActiveBrokers } from "../src/brokerRegistry";
+import { RemovalMethod } from "@shieldai/types";
+
+describe("BrokerRegistry", () => {
+  it("should have brokers registered", () => {
+    expect(BROKER_REGISTRY.length).toBeGreaterThan(0);
+  });
+
+  it("should find broker by id", () => {
+    const broker = getBrokerById("whitepages");
+    expect(broker).toBeDefined();
+    expect(broker?.name).toBe("Whitepages");
+    expect(broker?.domain).toBe("whitepages.com");
+  });
+
+  it("should return undefined for unknown broker", () => {
+    const broker = getBrokerById("nonexistent");
+    expect(broker).toBeUndefined();
+  });
+
+  it("should return only active brokers", () => {
+    const active = getActiveBrokers();
+    expect(active.length).toBeGreaterThan(0);
+    for (const broker of active) {
+      expect(broker.isActive).toBe(true);
+    }
+  });
+
+  it("should have varied removal methods", () => {
+    const methods = new Set(BROKER_REGISTRY.map((b) => b.removalMethod));
+    expect(methods.has(RemovalMethod.AUTOMATED)).toBe(true);
+    expect(methods.has(RemovalMethod.MANUAL_FORM)).toBe(true);
+    expect(methods.has(RemovalMethod.EMAIL)).toBe(true);
+  });
+});