feat: Preauth column for AI claims; searchable policy holder + ADA box 18; 2PA fix

- Schedule: last column is the Preauth column; "Claim for Column with AI" is now
  "Claim/Preauth for Column with AI" — that column's appointments go to PreAuth
  (MH, CCA, Tufts SCO, United/DentalHub; other insurances are skipped), the rest
  to Claim. Preauthorized appointments (hasPreauth) aren't resubmitted
- PreAuth payloads carry appointmentId; appointment X-rays/attachments are sent
  with MH/CCA/UnitedDH/Tufts preauths (shared appendAppointmentFiles helper)
- Patient form: policy holder is searchable from patients in the DB, plus
  "Relationship to Policy Holder/Subscriber" (Self, Spouse, Dependent Child,
  Other). New Patient columns policyHolderPatientId, policyHolderRelationship;
  browser-side schema updated so the fields aren't stripped on save
- ADA form: box 12-14 filled from the linked policy holder's record; box 18
  ticks the relationship (Self when the patient is the holder)
- AI notes: a bare "2PA" is an image count, not tooth #2 — restored before CDT
  lookup so it maps to D0220 #8 / D0230 #24

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/db/generated/prisma/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "prisma-client-1dff8570fa534b7236a935d3a9448f1a5d78e935490023ad3eb5b9b7018d99d5",
+  "name": "prisma-client-484c656978522fea1ec1b60912892a304ec69858e6bc3701e3e06b7030cdeafd",
   "main": "index.js",
   "types": "index.d.ts",
   "browser": "default.js",