feat: add BCBS MA eligibility check with OTP flow

- New Selenium worker (fresh Chrome per run, no persistent session)
  login → OTP modal → eTools → ConnectCenter → Verification →
  New Eligibility Request → fill form (NPI, member ID, DOB) →
  Expand All → CDP PDF back to app
- Backend route fetches BCBS_MA credentials + provider NPI from settings
- Frontend OTP modal with 6-digit code entry
- BCBS MA added to insurance credentials dropdown in settings

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

apps/Backend/src/queue/queues.ts

@@ -18,7 +18,8 @@ export type SeleniumJobType =
   | "uniteddh-claim-submit"
   | "tuftssco-eligibility-check"
   | "mh-eligibility-history-check"
-  | "cmsp-eligibility-history-remaining-check";
+  | "cmsp-eligibility-history-remaining-check"
+  | "bcbs-ma-eligibility-check";
 
 export interface SeleniumJobData {
   jobType: SeleniumJobType;