feat: add provider column, commission tracking, and report provider filter

- Claims & Payments: save npiProviderId when submitting MH claim; sync between claim and payment on update
- Claims table: add Provider column showing rendering provider name
- Payments table: add Provider column + purple Commissioned badge on status
- Claim edit modal: add Rendering Provider dropdown (defaults to Mary Scannell)
- Payment edit modal: add Rendering Provider dropdown + Commissioned metadata display
- Reports page: add Provider filter dropdown (dynamic from NPI providers settings)
- Reports page: remove Collections by Doctor report type and Select Doctor dropdown
- Commission section: new section in reports page with date range + provider filter, shows eligible paid claims/payments per provider, multi-select checkboxes, Pay Commission modal with print + save, marks payments as commissioned so they are excluded from future cycles
- DB: add CommissionBatch and CommissionBatchItem tables; backfill Payment.npiProviderId from linked claims
- Backend: PATCH /api/payments/:id/provider syncs to linked claim; PUT /api/claims/:id syncs to linked payment; new /api/commissions routes

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

packages/db/generated/prisma/schema.prisma

@@ -152,6 +152,8 @@ model NpiProvider {
 
   user                  User                   @relation(fields: [userId], references: [id], onDelete: Cascade)
   claims                Claim[]
+  payments              Payment[]
+  commissionBatches     CommissionBatch[]
   appointmentProcedures AppointmentProcedure[]
 
   @@unique([userId, npiNumber])
@@ -333,6 +335,7 @@ model Payment {
   patientId     Int
   userId        Int
   updatedById   Int?
+  npiProviderId Int?
   totalBilled   Decimal       @db.Decimal(10, 2)
   totalPaid     Decimal       @default(0.00) @db.Decimal(10, 2)
   totalAdjusted Decimal       @default(0.00) @db.Decimal(10, 2)
@@ -349,8 +352,10 @@ model Payment {
   claim                   Claim?                   @relation(fields: [claimId], references: [id], onDelete: Cascade)
   patient                 Patient                  @relation(fields: [patientId], references: [id], onDelete: Cascade)
   updatedBy               User?                    @relation("PaymentUpdatedBy", fields: [updatedById], references: [id])
+  npiProvider             NpiProvider?             @relation(fields: [npiProviderId], references: [id])
   serviceLineTransactions ServiceLineTransaction[]
   serviceLines            ServiceLine[]
+  commissionBatchItems    CommissionBatchItem[]
 
   @@index([claimId])
   @@index([patientId])
@@ -650,3 +655,31 @@ model PatientConversation {
 
   @@map("patient_conversation")
 }
+
+// Commission tracking
+model CommissionBatch {
+  id               Int      @id @default(autoincrement())
+  npiProviderId    Int
+  totalCollection  Decimal  @db.Decimal(14, 2)
+  commissionAmount Decimal  @db.Decimal(14, 2)
+  notes            String?
+  createdAt        DateTime @default(now())
+
+  npiProvider NpiProvider           @relation(fields: [npiProviderId], references: [id])
+  items       CommissionBatchItem[]
+
+  @@index([npiProviderId])
+}
+
+model CommissionBatchItem {
+  id                Int     @id @default(autoincrement())
+  commissionBatchId Int
+  paymentId         Int
+  collectionAmount  Decimal @db.Decimal(14, 2)
+
+  commissionBatch CommissionBatch @relation(fields: [commissionBatchId], references: [id], onDelete: Cascade)
+  payment         Payment         @relation(fields: [paymentId], references: [id])
+
+  @@unique([commissionBatchId, paymentId])
+  @@index([paymentId])
+}