auditing

server/prisma/schema.prisma

@@ -29,6 +29,7 @@ model User {
   salesQuoteRevisionsCreated SalesQuoteRevision[] @relation("SalesQuoteRevisionCreatedBy")
   salesOrderRevisionsCreated SalesOrderRevision[] @relation("SalesOrderRevisionCreatedBy")
   inventoryTransfersCreated InventoryTransfer[] @relation("InventoryTransferCreatedBy")
+  auditEvents AuditEvent[]
 }
 
 model Role {
@@ -698,3 +699,19 @@ model PurchaseReceiptLine {
   @@index([purchaseReceiptId])
   @@index([purchaseOrderLineId])
 }
+
+model AuditEvent {
+  id           String   @id @default(cuid())
+  actorId      String?
+  entityType   String
+  entityId     String?
+  action       String
+  summary      String
+  metadataJson String
+  createdAt    DateTime @default(now())
+  actor        User?    @relation(fields: [actorId], references: [id], onDelete: SetNull)
+
+  @@index([createdAt])
+  @@index([entityType, entityId, createdAt])
+  @@index([actorId, createdAt])
+}