Add FCC Carrier/ISP Registration: API, checkout, handler, dispatch

Phase 3-5:
- API: POST /api/v1/fcc-carrier-registration (order creation with pricing)
- API: GET /api/v1/fcc-carrier-registration/:id (status)
- API: GET /api/v1/fcc-carrier-registration/state-fees (formation fees)
- Checkout: fcc_carrier_registration order type with Stripe line items
- Payment handler: dispatch worker + send confirmation email
- Pipeline handler: 8-step CRTC-style pipeline (formation → CORES → 499 →
  DC Agent → State PUC → RMD/CPNI/CALEA/BDC → add-ons → final review)
- Job server dispatch map entry
- Service page CTA updated to link to order page

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/src/index.ts

@@ -44,6 +44,7 @@ import foreignQualRouter from "./routes/foreign-qualification.js";
 import corpStatusRouter from "./routes/corp-status.js";
 import portalRmdReviewRouter from "./routes/portal-rmd-review.js";
 import pucRouter from "./routes/puc.js";
+import fccCarrierRegRouter from "./routes/fcc-carrier-registration.js";
 
 const app = express();
 
@@ -112,6 +113,7 @@ app.use(lnpaRegionsRouter);
 app.use(fccFilingsRouter);
 app.use(foreignQualRouter);
 app.use(pucRouter);
+app.use(fccCarrierRegRouter);
 app.use(adminCryptoRouter);
 // Note: identityRouter mounted above express.json() for webhook route,
 // but also handles non-webhook routes (create-session, poll) which work fine with json()