chore(aiperf): bump submodule for SGLang realtime srv-row fallbacks

Pulls in cjq/agentx-v0.3-subagents @ baa95d73, which adds SGLang
metric-name fallbacks to ServerMetricsAccumulator.realtime_snapshot
so the realtime `srv prefix_cache_hit=... kv_usage=... queue=...`
log row populates for sglang servers instead of being suppressed
(every field was vLLM-only before).

Signed-off-by: Cam Quilici <cjquilici@gmail.com>

Author: cquil11