feat(agentx): retune Kimi-K3 FP4 MI355X ATOM DSpark recipe on _0821 (mirror of #2723) - #2725

Bugbot Analysis Progress (2m 11s elapsed)

✅ Gathered PR context (4s)
✅ Completed bug detection (2m 4s)
✅ Posted analysis results (4s)

Final Result: Bugbot completed review - no new issues found. 1 previously reported issue remain unresolved.

Request ID: serverGenReqId_eda29c59-5466-4f9c-84ee-ef9c499e5e4f