Preserve proof that cap64 training finished before indexing completes

Constraint: The cap64 run is still active, so only verified training-complete evidence can be recorded without overstating results
Rejected: Keep only the older build-index note | The live session now proves the entire high_energy epoch finished, which is stronger handoff evidence
Confidence: high
Scope-risk: narrow
Directive: Distinguish clearly between training-complete, indexing-complete, and report-complete milestones in future cap64 checkpoints
Tested: Verified live session output shows high_energy Epoch 1 progressed from 0/32 to 32/32, and verified the active process remains run_demo.py build-index on /tmp/ab_smoke_seg_cap64_top2/high_energy/fma/manifests
Not-tested: Final cap64 eval metrics, hybrid branch progress, and report.json generation

+## 2026-06-02 cap64 训练完成证据 checkpoint
+
+完成项：
+- 追加记录 cap64 的更强 fresh evidence。
+- 已从运行会话直接确认 `high_energy` 的 `Epoch 1/1` 训练完整跑完。
+- 当前主流程仍停留在 `run_demo.py build-index`，尚未进入 `evaluate.py`。
+
+验证证据：
+- 运行会话输出显示：`Epoch 1` 从 `0/32` 推进到 `32/32` 完成。
+- 进程树仍显示：`run_demo.py build-index --data /tmp/ab_smoke_seg_cap64_top2/high_energy/fma/manifests ...`
+
 ## 2026-06-02 cap64 进入 build-index checkpoint
 
 完成项：

@@ -60,5 +60,5 @@ test -f /tmp/ab_smoke_seg_cap48_top2_seed999/report.json && cat /tmp/ab_smoke_se
 ## 下一轮已启动
 
 - 新 benchmark：`/tmp/ab_smoke_seg_cap64_top2`
-- 当前阶段：`high_energy` build-index 中
+- 当前阶段：`high_energy` 训练已完成，现处于 build-index 中
 - 下一 session 应优先检查 `report.json` 是否生成

@@ -675,6 +675,6 @@ seed123 最终结论：
 - 已启动：`/tmp/ab_smoke_seg_cap64_top2`
 - 配置：`subset_size=64`, `max_test_queries=32`, `seed=42`
 - 当前最新证据：
-  - 已从 `high_energy train.py` 推进到 `run_demo.py build-index`
-  - 尚未产出最终 `report.json`
+  - 已从运行会话确认 `high_energy` 的 `Epoch 1/1` 完整跑完（`32/32`）
+  - 当前处于 `run_demo.py build-index`，尚未产出最终 `report.json`