feat(actions): allow admins to manage all runners

System administrators can now view, edit, and delete any runner regardless of context (repo/org/user). Previously, admins were restricted by the same ownership rules as regular users. Also removes redundant deleted_unix filter in GetUnhealthyRunners query.

models/actions/runner_health.go

@@ -280,7 +280,7 @@ func CompleteCleanupRequest(ctx context.Context, id int64, success bool, bytesFr
 // GetUnhealthyRunners returns all runners that are unhealthy
 func GetUnhealthyRunners(ctx context.Context) ([]*ActionRunner, error) {
 	var runners []*ActionRunner
-	err := db.GetEngine(ctx).Where("deleted_unix = 0").Find(&runners)
+	err := db.GetEngine(ctx).Find(&runners)
 	if err != nil {
 		return nil, err
 	}