Preserve proof that cap64 hybrid training fully finished before scoring lands

Constraint: The cap64 run is still active, so only verified training-complete evidence can be recorded now without overstating results
Rejected: Wait for hybrid eval before checkpointing | Would lose the stronger handoff evidence that the full hybrid epoch already completed
Confidence: high
Scope-risk: narrow
Directive: Keep distinguishing hybrid training-complete from hybrid index/eval completion until report.json lands
Tested: Verified live session output shows hybrid 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/hybrid/fma/manifests while hybrid eval.json and report.json remain absent
Not-tested: Final hybrid cap64 metrics, final report.json, and any cap64 winner conclusion

+## 2026-06-02 cap64 hybrid 训练完成证据 checkpoint
+
+完成项：
+- 追加记录 cap64 的 `hybrid` 训练完成证据。
+- 已从运行会话直接确认 `hybrid` 的 `Epoch 1/1` 从 `0/32` 推进到 `32/32` 完成。
+- 当前进程仍处于 `run_demo.py build-index` 阶段。
+
+验证证据：
+- 运行会话输出显示：`Epoch 1` 完整跑完。
+- 当前进程显示：`run_demo.py build-index --data /tmp/ab_smoke_seg_cap64_top2/hybrid/fma/manifests ...`
+
 ## 2026-06-02 cap64 hybrid 进入 build-index checkpoint
 
 完成项：

@@ -74,3 +74,5 @@ cd /workspace/acr-engine
 - 已补充 cap64 阶段推进：`hybrid` 已进入训练阶段。
 
 - 已补充 cap64 阶段推进：`hybrid` 已完成训练并进入 build-index。
+
+- 已补充 cap64 新鲜证据：从运行会话确认 `hybrid` 的 `Epoch 1/1` 已完整跑完。

@@ -61,5 +61,5 @@ test -f /tmp/ab_smoke_seg_cap48_top2_seed999/report.json && cat /tmp/ab_smoke_se
 
 - 新 benchmark：`/tmp/ab_smoke_seg_cap64_top2`
 - 当前阶段：`high_energy` 已完成评测，结果为 `top1=0.625 / topk=1.0 / num_queries=32`
-- 当前已切换到 `hybrid` build-index 阶段
+- 当前 `hybrid` 训练已完成，现处于 build-index 阶段
 - 下一 session 应优先检查 `hybrid` 结果与 `report.json` 是否生成

@@ -676,6 +676,7 @@ seed123 最终结论：
 - 配置：`subset_size=64`, `max_test_queries=32`, `seed=42`
 - 当前最新证据：
   - `high_energy` 已完成评测：`num_queries=32, top1=0.625, topk=1.0`
-  - `hybrid` 已完成训练并进入 `run_demo.py build-index`
+  - 已从运行会话确认 `hybrid` 的 `Epoch 1/1` 完整跑完（`32/32`）
+  - 当前处于 `run_demo.py build-index`
   - 总 `report.json` 尚未生成