fix: include activity wall time

cai

2026-07-09 2bb392c03cdc76e27716f1d957cbb59016feaa4d

fix: include activity wall time

 src/main.rs

@@ -596,6 +596,7 @@
        "traceId": trace_id,
        "turnId": turn_id,
        "eventName": event_name,
        "eventWallTimeMs": current_time_millis(),
        "result": result,
        "reasonCode": reason_code,
        "retryable": retryable,