feat(P19ERP1-1,P19ERP1-2): 新增ERP主数据同步模型与服务

server/prisma/schema.prisma

@@ -1205,6 +1205,47 @@ model IntegrationOutbox {
   @@map("integration_outbox")
 }
 
+model IntegrationBinding {
+  id            String    @id @default(uuid()) @db.Uuid
+  provider      String    @db.VarChar(32)
+  entity_type   String    @db.VarChar(32)
+  local_id      String    @db.Uuid
+  external_id   String?   @db.VarChar(128)
+  external_code String?   @db.VarChar(128)
+  last_synced_at DateTime?
+
+  created_at DateTime @default(now())
+  created_by String?  @db.Uuid
+  updated_at DateTime @updatedAt
+  updated_by String?  @db.Uuid
+
+  @@unique([provider, entity_type, local_id], map: "integration_bindings_provider_entity_local_ux")
+  @@unique([provider, entity_type, external_id], map: "integration_bindings_provider_entity_external_id_ux")
+  @@index([provider, entity_type, external_code], map: "idx_integration_bindings_provider_entity_external_code")
+  @@map("integration_bindings")
+}
+
+model IntegrationSyncState {
+  id              String    @id @default(uuid()) @db.Uuid
+  provider        String    @db.VarChar(32)
+  resource_type   String    @db.VarChar(32)
+  status          String    @default("idle") @db.VarChar(16)
+  last_result     Json?
+  last_error      String?
+  last_started_at DateTime?
+  last_finished_at DateTime?
+  last_success_at DateTime?
+
+  created_at DateTime @default(now())
+  created_by String?  @db.Uuid
+  updated_at DateTime @updatedAt
+  updated_by String?  @db.Uuid
+
+  @@unique([provider, resource_type], map: "integration_sync_states_provider_resource_ux")
+  @@index([provider, status], map: "idx_integration_sync_states_provider_status")
+  @@map("integration_sync_states")
+}
+
 model TravelOrder {
   id                      String    @id @default(uuid()) @db.Uuid
   source                  String    @default("manual") @db.VarChar(32)