Worker versioning related updates

temporal/api/common/v1/message.proto

@@ -129,6 +129,10 @@ message WorkerVersionStamp {
     // Set if the worker used a dynamically loadable bundle to process
     // the task. The bundle could be a WASM blob, JS bundle, etc.
     string bundle_id = 2;
+
+    // If set, the worker is opting in to worker versioning. Otherwise, the version stamp is used as a marker for
+    // workflow reset points and the BuildId search attibute.
+    bool uses_versioning = 3;
 }
 
 // Identifies the version(s) that a worker is compatible with when polling or identifying itself

temporal/api/taskqueue/v1/message.proto

@@ -87,12 +87,9 @@ message StickyExecutionAttributes {
     google.protobuf.Duration schedule_to_start_timeout = 2 [(gogoproto.stdduration) = true];
 }
 
-// Used by the worker versioning APIs, represents an ordering of one or more versions which are
-// considered to be compatible with each other. Currently the versions are always worker build ids.
+// Used by the worker versioning APIs, represents an unordered set of one or more versions which are
+// considered to be compatible with each other. Currently the versions are always worker build IDs.
 message CompatibleVersionSet {
-    // A unique identifier for this version set. Users don't need to understand or care about this
-    // value, but it has value for debugging purposes.
-    string version_set_id = 1;
-    // All the compatible versions, ordered from oldest to newest
-    repeated string build_ids = 2;
+    // All the compatible versions, unordered, except for the last element, which is considered the set "default".
+    repeated string build_ids = 1;
 }