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/results/AppointmentFindFirstResult.schema.js

@@ -45,14 +45,17 @@ exports.AppointmentFindFirstResultSchema = z.nullable(z.object({
     startTime: z.string(),
     endTime: z.string(),
     type: z.string(),
+    typeLocked: z.boolean(),
     notes: z.string().optional(),
     procedureCodeNotes: z.string().optional(),
     status: z.string(),
+    movedByAi: z.boolean(),
     createdAt: z.date(),
     eligibilityStatus: z.unknown(),
     patient: z.unknown(),
     user: z.unknown(),
     staff: z.unknown().optional(),
     procedures: z.array(z.unknown()),
-    claims: z.array(z.unknown())
+    claims: z.array(z.unknown()),
+    files: z.array(z.unknown())
 }));