feat(sat): add database models for SAT sync

Phase 1 - Database models:
- Add FielCredential model for encrypted FIEL storage
- Add SatSyncJob model for sync job tracking
- Add SAT-related enums (SatSyncType, SatSyncStatus, CfdiSyncType)
- Add TypeScript types in shared package
- Relations: Tenant -> FielCredential (1:1), Tenant -> SatSyncJobs (1:N)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/prisma/schema.prisma

@@ -19,7 +19,9 @@ model Tenant {
   createdAt   DateTime  @default(now()) @map("created_at")
   expiresAt   DateTime? @map("expires_at")
 
-  users User[]
+  users          User[]
+  fielCredential FielCredential?
+  satSyncJobs    SatSyncJob[]
 
   @@map("tenants")
 }
@@ -62,3 +64,75 @@ enum Role {
   contador
   visor
 }
+
+// ============================================
+// SAT Sync Models
+// ============================================
+
+model FielCredential {
+  id                   String   @id @default(uuid())
+  tenantId             String   @unique @map("tenant_id")
+  rfc                  String   @db.VarChar(13)
+  cerData              Bytes    @map("cer_data")
+  keyData              Bytes    @map("key_data")
+  keyPasswordEncrypted Bytes    @map("key_password_encrypted")
+  encryptionIv         Bytes    @map("encryption_iv")
+  encryptionTag        Bytes    @map("encryption_tag")
+  serialNumber         String?  @map("serial_number") @db.VarChar(50)
+  validFrom            DateTime @map("valid_from")
+  validUntil           DateTime @map("valid_until")
+  isActive             Boolean  @default(true) @map("is_active")
+  createdAt            DateTime @default(now()) @map("created_at")
+  updatedAt            DateTime @updatedAt @map("updated_at")
+
+  tenant Tenant @relation(fields: [tenantId], references: [id], onDelete: Cascade)
+
+  @@map("fiel_credentials")
+}
+
+model SatSyncJob {
+  id              String        @id @default(uuid())
+  tenantId        String        @map("tenant_id")
+  type            SatSyncType
+  status          SatSyncStatus @default(pending)
+  dateFrom        DateTime      @map("date_from") @db.Date
+  dateTo          DateTime      @map("date_to") @db.Date
+  cfdiType        CfdiSyncType? @map("cfdi_type")
+  satRequestId    String?       @map("sat_request_id") @db.VarChar(50)
+  satPackageIds   String[]      @map("sat_package_ids")
+  cfdisFound      Int           @default(0) @map("cfdis_found")
+  cfdisDownloaded Int           @default(0) @map("cfdis_downloaded")
+  cfdisInserted   Int           @default(0) @map("cfdis_inserted")
+  cfdisUpdated    Int           @default(0) @map("cfdis_updated")
+  progressPercent Int           @default(0) @map("progress_percent")
+  errorMessage    String?       @map("error_message")
+  startedAt       DateTime?     @map("started_at")
+  completedAt     DateTime?     @map("completed_at")
+  createdAt       DateTime      @default(now()) @map("created_at")
+  retryCount      Int           @default(0) @map("retry_count")
+  nextRetryAt     DateTime?     @map("next_retry_at")
+
+  tenant Tenant @relation(fields: [tenantId], references: [id], onDelete: Cascade)
+
+  @@index([tenantId])
+  @@index([status])
+  @@index([status, nextRetryAt])
+  @@map("sat_sync_jobs")
+}
+
+enum SatSyncType {
+  initial
+  daily
+}
+
+enum SatSyncStatus {
+  pending
+  running
+  completed
+  failed
+}
+
+enum CfdiSyncType {
+  emitidos
+  recibidos
+}