Add initial project files

apps/backend/app/services/swagger_model.ts

@@ -0,0 +1,18 @@
+const typeMap: Record<string, any> = {
+  number: { type: 'integer', format: 'int64' },
+  string: { type: 'string' },
+  Date: { type: 'string', format: 'date-time' },
+  boolean: { type: 'boolean' },
+}
+export async function modelToSchema(model: any) {
+  const properties: Record<string, any> = {}
+  for (const [key, meta] of model.$columnsDefinitions.entries()) {
+    const tsType = meta.meta?.designType?.name || 'string'
+    const mapped = typeMap[tsType] ?? { type: 'string' }
+    properties[meta?.serializeAs || key] = {
+      ...mapped,
+      description: key.replace(/([A-Z])/g, ' $1').trim(),
+    }
+  }
+  return JSON.stringify(properties)
+}