fix(rectification): 候选分钟不变量记忆化（BUG-721）

Shadbala / Ashtakavarga / Dasha 时间轴进 static context；过境盘按事件日期缓存 chart；探针网格相同时只算一次。打分与决策回执与基线 golden 逐字相同（剔除计时字段）。

scripts/rectification/refinement_packet.py

@@ -697,7 +697,11 @@ def build_refinement_packet(
             "unique_minute_claim": False,
             "confirmation_allowed": False,
         }
-    from scripts.rectification.candidate_contrast import PROBE_PHASE_HOLDOUT_VALIDATION, event_year
+    from scripts.rectification.candidate_contrast import (
+        PROBE_PHASE_HOLDOUT_VALIDATION,
+        event_year,
+        opportunity_from_probe,
+    )
     from scripts.rectification.case_holdout import reserved_holdout_events
     from scripts.rectification.event_probes import (
         candidate_contrast_opportunities,
@@ -729,13 +733,16 @@ def build_refinement_packet(
     dropped = list(bundle["dropped"])
     clarification = event_clarification_probes(request)
     collection = evidence_collection_probes(request)
-    opportunities = candidate_contrast_opportunities(
-        request,
-        built,
-        scan=scan,
-        candidate_times=grid_times,
-        representative_time=representative_time,
-    )
+    if probe_times == grid_times:
+        opportunities = [opportunity_from_probe(probe) for probe in probes]
+    else:
+        opportunities = candidate_contrast_opportunities(
+            request,
+            built,
+            scan=scan,
+            candidate_times=grid_times,
+            representative_time=representative_time,
+        )
     reserved = reserved_holdout_events(request.get("events") or [])
     holdout = [
         {