feat: carry enacted_by identity on Abort/Signal and add SignalInfo result

Add `aborted_by` to `AbortRequest` and `signalled_by` to `SignalRequest`
(both `common.EnrichedIdentity`) so the Run Service can record the actor
that initiated an abort/signal. Add a `SignalInfo` result branch on
`ActionDetails` for surfacing the signaller identity on terminal
condition actions.

Assisted-by: Claude
Signed-off-by: Sergey Vilgelm <sergey@union.ai>

Author: SVilgelm

flyteidl2/actions/actions_service.proto

@@ -4,6 +4,7 @@ package flyteidl2.actions;
 
 import "buf/validate/validate.proto";
 import "flyteidl2/common/identifier.proto";
+import "flyteidl2/common/identity.proto";
 import "flyteidl2/core/literals.proto";
 import "flyteidl2/task/run.proto";
 import "flyteidl2/workflow/run_definition.proto";
@@ -150,6 +151,11 @@ message AbortRequest {
 
   // Reason for aborting the action, if applicable.
   optional string reason = 2;
+
+  // Identity of the caller that issued the abort. Populated by Run Service
+  // with a stripped-down EnrichedIdentity (subject only) for storage and
+  // replication; the full identity is re-enriched on read.
+  optional flyteidl2.common.EnrichedIdentity aborted_by = 3;
 }
 
 // AbortResponse is the response message for aborting a queued or running action.
@@ -171,6 +177,11 @@ message SignalRequest {
   // The value literal to signal the condition with. Must match the
   // ConditionAction.type declared at enqueue time.
   flyteidl2.core.Literal value = 3 [(buf.validate.field).required = true];
+
+  // Identity of the caller that issued the signal. Populated by Run Service
+  // with a stripped-down EnrichedIdentity (subject only) for storage and
+  // replication; the full identity is re-enriched on read.
+  optional flyteidl2.common.EnrichedIdentity signalled_by = 4;
 }
 
 // SignalResponse is the response message for resolving a condition action.

flyteidl2/workflow/run_definition.proto

@@ -273,6 +273,12 @@ message AbortInfo {
   common.EnrichedIdentity aborted_by = 2;
 }
 
+// SignalInfo captures details of a condition action resolved via Signal.
+message SignalInfo {
+  // Identity that signalled the condition.
+  common.EnrichedIdentity signalled_by = 1;
+}
+
 // ActionDetails is the full details of an action.
 message ActionDetails {
   // Id for this action.
@@ -289,6 +295,8 @@ message ActionDetails {
     ErrorInfo error_info = 4;
     // Abort info for the action, if aborted.
     AbortInfo abort_info = 5;
+    // Signal info for a condition action resolved via Signal.
+    SignalInfo signal_info = 10;
   }
 
   // Fully resolved spec of the action. Merges user submitted task spec with platform defaults.