fix(rectification): use candidate dates for cross-midnight dasha scoring

Add date-isolated caches and regression coverage, align scoring identity, and freeze full research reruns while preserving historical artifacts. Record unresolved cache/receipt identity and end-to-end acceptance gaps for branch review only.

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

docs/research/ACTIVE_FRONTS.md

@@ -8,7 +8,9 @@ This file is the small index for the current engineering fronts that still drive
 - [固定口径重跑与契约](sealed_holdout_rerun_2026_09_20.md)：已曝光 v3 的当前实现成绩，不是新的独立盲测；确认门关闭。
 - [v5 独立封存采集协议](sealed_holdout_v5_protocol_2026_09_20.md)：本轮只出协议，不采事件。
 - 前置结论：[分钟分辨率两轮研究](rectification_minute_resolution_closure_2026_09_14.md)。不重走已证伪的加权重与簇合并假设。
-- 执行状态：[本轮进度](../tasks/PROGRESS-rectification-validation-20260920.md)。
+- 验证补缺轮：[进度](../tasks/PROGRESS-rectification-validation-20260920.md)。
+- 后续候选级跨午夜日期修复：[进度与独立验收](../tasks/PROGRESS-rectification-cross-midnight-20260920.md)。当前评测转至 `reported_offset_cross_midnight_2026_09_20.json` / `sealed_holdout_rerun_cross_midnight_2026_09_20.json`；旧 JSON / freeze 原字节留存，旧文档及评测器在 `history/rectification_pre_cross_midnight_2026_09_20/`。
+- 尚未闭环：BUG-982 跨午夜簇跨度、BUG-983 凌晨日期锚点、BUG-984 时段缓存/回执身份；[验收补单](../tasks/TASK-rectification-cross-midnight-dasha-fix-20260920.md) 不代表批准实施。
 
 ## Shortest-Path Closure Order (2026-06-29)