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/objects/ClaimWhereInput.schema.ts

@@ -31,7 +31,7 @@ const claimwhereinputSchema = z.object({
   NOT: z.union([z.lazy(() => ClaimWhereInputObjectSchema), z.lazy(() => ClaimWhereInputObjectSchema).array()]).optional(),
   id: z.union([z.lazy(() => IntFilterObjectSchema), z.number().int()]).optional(),
   patientId: z.union([z.lazy(() => IntFilterObjectSchema), z.number().int()]).optional(),
-  appointmentId: z.union([z.lazy(() => IntNullableFilterObjectSchema), z.number().int()]).optional().nullable(),
+  appointmentId: z.union([z.lazy(() => IntNullableFilterObjectSchema), z.number().int().int()]).optional().nullable(),
   userId: z.union([z.lazy(() => IntFilterObjectSchema), z.number().int()]).optional(),
   staffId: z.union([z.lazy(() => IntFilterObjectSchema), z.number().int()]).optional(),
   patientName: z.union([z.lazy(() => StringFilterObjectSchema), z.string()]).optional(),