fix: enforce group tool policy inheritance for subagents (#1557) (thanks @adam91holt)

src/agents/pi-embedded-runner/run.ts

@@ -267,6 +267,7 @@ export async function runEmbeddedPiAgent(
             groupId: params.groupId,
             groupChannel: params.groupChannel,
             groupSpace: params.groupSpace,
+            spawnedBy: params.spawnedBy,
             currentChannelId: params.currentChannelId,
             currentThreadTs: params.currentThreadTs,
             replyToMode: params.replyToMode,