feat: rename DDMA to ClaimMD across selenium service, remove MH/CMSP eligibility feature

Rename ddma_browser_manager/helpers/worker files to claimmd_* naming in
SeleniumService. Remove the MassHealth (MH) and CMSP eligibility-check
feature end to end: buttons and dead placeholder buttons on the insurance
eligibility page, their handlers and auto-trigger wiring, the chatbot's
MassHealth-only manual paste flow, backend routes/queue job types/processors,
and the corresponding Python Selenium worker endpoints. Multi-provider
eligibility checking (DDMA, Delta, Tufts SCO, United SCO, CCA, BCBS MA) and
the Twilio SMS eligibility flow are untouched.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

packages/db/shared/helpers/decimal-helpers.ts

@@ -1,7 +1,8 @@
 import * as z from 'zod';
 
-import { Prisma } from '../../generated/prisma';
-import Decimal from 'decimal.js';
+import type { Prisma } from '../../generated/prisma';
+
+import Decimal from "decimal.js";
 
 // DECIMAL HELPERS
 //------------------------------------------------------
@@ -23,7 +24,7 @@ export const isValidDecimalInput = (
   if (v === undefined || v === null) return false;
   return (
     // Explicit instance checks first
-    v instanceof Prisma.Decimal ||
+    v instanceof Decimal ||
     // If Decimal.js is present and imported by the generator, this symbol exists at runtime
     // eslint-disable-next-line @typescript-eslint/ban-ts-comment
     // @ts-ignore - Decimal may be undefined when not installed; codegen controls the import