Gate it behind feature flags

libs/compute_api/src/spec.rs

@@ -90,6 +90,9 @@ pub enum ComputeFeature {
     /// track short-lived connections as user activity.
     ActivityMonitorExperimental,
 
+    /// Enable running migrations
+    Migrations,
+
     /// This is a special feature flag that is used to represent unknown feature flags.
     /// Basically all unknown to enum flags are represented as this one. See unit test
     /// `parse_unknown_features()` for more details.