fix(vv): resolve all 6 V&V issues — field trial unblocked

All findings from the inaugural LeadValidator audit resolved and
confirmed. Release gate: PASS.

VV_ISSUE_002 (BLOCKER): 15 OpenAPI specs verified present covering
all 20 route groups (46 endpoints documented in docs/openapi/)

VV_ISSUE_003 (MAJOR): Remove any types from src/db/pool.ts —
replaced pool.query shim with unknown[] + Object.defineProperty,
zero any types, eslint-disable suppressions removed

VV_ISSUE_004 (MAJOR): Remove raw Pool from ScaffoldController and
HealthDetailedController — injected AgentRepository/CredentialRepository
and DbProbe interface respectively; added CredentialRepository.findActiveClientId()

VV_ISSUE_005 (MAJOR): Add unit tests for 5 untested services —
ComplianceStatusStore, EventPublisher, MarketplaceService,
OIDCTrustPolicyService, UsageService

VV_ISSUE_006 (MAJOR): Add integration tests for 7 missing route
groups — analytics, billing, tiers, webhooks, marketplace,
oidc-trust-policies, oidc-token-exchange

VV_ISSUE_001 (MINOR): Create missing design.md and tasks.md in 4
OpenSpec archives — all archives now complete

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

tests/integration/billing.test.ts

@@ -0,0 +1,141 @@
+/**
+ * Integration tests for Billing endpoints.
+ * Uses a real Postgres test DB and Redis test instance.
+ *
+ * Routes covered:
+ *   POST /api/v1/billing/checkout — create Stripe Checkout Session (authenticated)
+ *   POST /api/v1/billing/webhook  — Stripe webhook handler (unauthenticated, raw body)
+ *   GET  /api/v1/billing/usage    — today's usage summary (authenticated)
+ */
+
+import crypto from 'crypto';
+import request from 'supertest';
+import { Application } from 'express';
+import { v4 as uuidv4 } from 'uuid';
+import { Pool } from 'pg';
+
+const { privateKey, publicKey } = crypto.generateKeyPairSync('rsa', {
+  modulusLength: 2048,
+  publicKeyEncoding: { type: 'spki', format: 'pem' },
+  privateKeyEncoding: { type: 'pkcs8', format: 'pem' },
+});
+
+process.env['DATABASE_URL'] =
+  process.env['TEST_DATABASE_URL'] ??
+  'postgresql://sentryagent:sentryagent@localhost:5432/sentryagent_idp_test';
+process.env['REDIS_URL'] = process.env['TEST_REDIS_URL'] ?? 'redis://localhost:6379/1';
+process.env['JWT_PRIVATE_KEY'] = privateKey;
+process.env['JWT_PUBLIC_KEY'] = publicKey;
+process.env['NODE_ENV'] = 'test';
+process.env['DEFAULT_ORG_ID'] = 'org_system';
+// Use a test Stripe key placeholder — actual Stripe calls will not be made in unit context
+process.env['STRIPE_SECRET_KEY'] = 'sk_test_placeholder';
+process.env['STRIPE_WEBHOOK_SECRET'] = 'whsec_test_placeholder';
+
+import { createApp } from '../../src/app';
+import { signToken } from '../../src/utils/jwt';
+import { closePool } from '../../src/db/pool';
+import { closeRedisClient } from '../../src/cache/redis';
+
+const ORG_ID = uuidv4();
+const AGENT_ID = uuidv4();
+
+function makeToken(sub: string = AGENT_ID, scope = 'billing:manage', orgId: string = ORG_ID): string {
+  return signToken({ sub, client_id: sub, scope, organization_id: orgId, jti: uuidv4() }, privateKey);
+}
+
+describe('Billing Endpoints Integration Tests', () => {
+  let app: Application;
+  let pool: Pool;
+
+  beforeAll(async () => {
+    app = await createApp();
+    pool = new Pool({ connectionString: process.env['DATABASE_URL'] });
+
+    await pool.query(`
+      CREATE TABLE IF NOT EXISTS organizations (
+        organization_id VARCHAR(40) PRIMARY KEY,
+        name VARCHAR(100) NOT NULL,
+        plan VARCHAR(20) NOT NULL DEFAULT 'free',
+        created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+        updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+      )
+    `);
+
+    await pool.query(`
+      CREATE TABLE IF NOT EXISTS usage_events (
+        id BIGSERIAL PRIMARY KEY,
+        tenant_id VARCHAR(40) NOT NULL,
+        date DATE NOT NULL,
+        metric_type VARCHAR(50) NOT NULL,
+        count INTEGER NOT NULL DEFAULT 1
+      )
+    `);
+
+    await pool.query(
+      `INSERT INTO organizations (organization_id, name) VALUES ($1, $2) ON CONFLICT DO NOTHING`,
+      [ORG_ID, 'Test Billing Org'],
+    );
+  });
+
+  afterAll(async () => {
+    await pool.query(`DELETE FROM usage_events WHERE tenant_id = $1`, [ORG_ID]);
+    await pool.query(`DELETE FROM organizations WHERE organization_id = $1`, [ORG_ID]);
+    await pool.end();
+    await closePool();
+    await closeRedisClient();
+  });
+
+  // ─── GET /billing/usage ──────────────────────────────────────────────────────
+
+  describe('GET /api/v1/billing/usage', () => {
+    it('should return 200 with usage summary for authenticated user', async () => {
+      const res = await request(app)
+        .get('/api/v1/billing/usage')
+        .set('Authorization', `Bearer ${makeToken()}`);
+
+      expect(res.status).toBe(200);
+      expect(res.body).toHaveProperty('apiCalls');
+    });
+
+    it('should return 401 when no token provided', async () => {
+      const res = await request(app).get('/api/v1/billing/usage');
+      expect(res.status).toBe(401);
+    });
+  });
+
+  // ─── POST /billing/checkout ──────────────────────────────────────────────────
+
+  describe('POST /api/v1/billing/checkout', () => {
+    it('should return 401 when no token provided', async () => {
+      const res = await request(app)
+        .post('/api/v1/billing/checkout')
+        .send({ targetTier: 'pro' });
+
+      expect(res.status).toBe(401);
+    });
+
+    it('should return 422 when targetTier is missing', async () => {
+      const res = await request(app)
+        .post('/api/v1/billing/checkout')
+        .set('Authorization', `Bearer ${makeToken()}`)
+        .send({});
+
+      expect([400, 422]).toContain(res.status);
+    });
+  });
+
+  // ─── POST /billing/webhook ───────────────────────────────────────────────────
+
+  describe('POST /api/v1/billing/webhook', () => {
+    it('should return 400 when Stripe-Signature header is missing', async () => {
+      const res = await request(app)
+        .post('/api/v1/billing/webhook')
+        .set('Content-Type', 'application/json')
+        .send(JSON.stringify({ type: 'checkout.session.completed' }));
+
+      // Stripe webhook verification will fail without the signature
+      expect([400, 401, 403]).toContain(res.status);
+    });
+  });
+});