Extend rowlocking to non-FBOS clients also

app/controllers/api/abstract_controller.rb

@@ -83,16 +83,23 @@ def resource # OVERRIDE THIS IN CHILD
       nil
     end
 
+    def stale_data?
+      if resource
+        updated_at = raw_json[:updated_at]
+        if updated_at
+          if resource.updated_at.as_json != updated_at
+            return true
+          end
+        end
+      end
+      return false
+    end
+
     # If FarmBot OS goes offline for a very long time,
     # you don't want to corrupt user data with stale records.
-    # The row lock is only enforced for FBOS devices (not the FE)
     def maybe_enforce_row_lock
-      when_farmbot_os do
-        if raw_json[:updated_at] && resource
-          if resource.updated_at.as_json != raw_json[:updated_at]
-            render json: { stale_record: STALE_RECORD }, status: 409
-          end
-        end
+      if stale_data?
+        render json: { stale_record: STALE_RECORD }, status: 409
       end
     end