fix(delegate-task): preserve variant in sync-continuation metadata model

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/tools/delegate-task/sync-continuation.ts

@@ -74,6 +74,10 @@ export async function executeSyncContinuation(
     }
 
     const syncContMeta = {
+    const resumeModelForMetadata = resumeModel && resumeVariant !== undefined
+      ? { ...resumeModel, variant: resumeVariant }
+      : resumeModel
+
       title: `Continue: ${args.description}`,
       metadata: {
         prompt: args.prompt,
@@ -87,7 +91,7 @@ export async function executeSyncContinuation(
         sessionId: continuationID,
         sync: true,
         command: args.command,
-        model: resolveMetadataModel(resumeModel, parentContext.model),
+        model: resolveMetadataModel(resumeModelForMetadata, parentContext.model),
       },
     }
     await publishToolMetadata(ctx, syncContMeta)