fix(changelog): trim verbose description for agentic-mtp entry

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: seungrokj

perf-changelog.yaml

@@ -4955,10 +4955,4 @@
     - dsv4-fp4-mi355x-sglang-agentic-mtp
   description:
     - "Add DSv4 FP4 MI355X SGLang agentic MTP recipe (separate from hicache config)"
-    - "Image: lmsysorg/sglang-rocm:v0.5.15.post1-rocm720-mi35x-20260714"
-    - "EAGLE speculative decoding: 3 steps, topk 1, 4 draft tokens"
-    - "DPA: --enable-prefill-delayer, GPU_MAX_HW_QUEUES=5, chunked prefill 8192*TP"
-    - "MAX_RUNNING_REQUESTS = 2*CONC, CUDA_GRAPH_MAX_BS = CONC (cap 128)"
-    - "MEM_FRACTION_STATIC reduced by 0.10 when spec decoding active"
-    - "Sweep TP8 conc [4,8] non-DPA + conc [16,32,48,52] DPA"
   pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/2254