fix: allow claims without appointment + support post/core multi-tooth input

- Make appointmentId nullable/optional in Prisma Zod schema via @zod rich
  comment so claims can be submitted without an existing appointment
- Convert undefined appointmentId to null in all claim form handlers and
  the backend claim creation endpoint
- Add AI classifier rule for expanding one procedure across multiple
  comma-separated tooth numbers (e.g. "post/core on #23, 24, 25, 26")
- Add "post/core" (slash) alias to CDT lookup maps

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

packages/db/shared/schemas/enums/NpiProviderScalarFieldEnum.schema.js

@@ -35,4 +35,4 @@ var __importStar = (this && this.__importStar) || (function () {
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.NpiProviderScalarFieldEnumSchema = void 0;
 const z = __importStar(require("zod"));
-exports.NpiProviderScalarFieldEnumSchema = z.enum(['id', 'userId', 'npiNumber', 'providerName', 'createdAt']);
+exports.NpiProviderScalarFieldEnumSchema = z.enum(['id', 'userId', 'npiNumber', 'providerName', 'sortOrder', 'createdAt']);