fix(rectification): anchor candidate windows to civil dates across midnight

Carry explicit local date intervals instead of inferring the day from clock
order. Cluster width, delivery, adoption, and reports keep the actual civil
date; adopted date is stored separately from the reported birth_date.

Algorithm identity is scoring-9 / spec-v5. Scoring weights, confirmation
thresholds, and Skill version are unchanged. Isolated Linux final-3 gates
passed; four pre-existing Python failures remain. This is not a production
release.

tests/test_rectification_v5_vedastro_validation.py

@@ -117,12 +117,15 @@ def test_requires_exactly_two_distinct_candidate_times_before_running_vedastro()
             handler._compute_rectification_v5_vedastro_validate(request(candidate_times))
 
 
-def test_passes_only_when_official_layers_discriminate_and_primary_is_strictly_better(monkeypatch):
+@pytest.mark.parametrize("dated", [False, True])
+def test_passes_only_when_official_layers_discriminate_and_primary_is_strictly_better(monkeypatch, dated):
     range_calls = []
+    minute_dates = []
 
     class Adapter:
         @staticmethod
         def run_rectification_minute_snapshot_for_case(case, case_id="user_chart"):
+            minute_dates.append((case["year"], case["month"], case["day"]))
             return minute_snapshot(case)
 
         @staticmethod
@@ -141,7 +144,13 @@ def test_passes_only_when_official_layers_discriminate_and_primary_is_strictly_b
     monkeypatch.setattr("scripts.jyotish_api_server._load_local_module", lambda name: Adapter)
     monkeypatch.setenv("VEDASTRO_API_KEY", "must-not-leak")
 
-    result = object.__new__(JyotishAPIHandler)._compute_rectification_v5_vedastro_validate(request())
+    body = request()
+    if dated:
+        body["birth_date"] = "2000-03-01"
+        body["candidate_intervals"] = [{"start_at": "2000-02-29T05:13", "end_at": "2000-02-29T05:14"}]
+    result = object.__new__(JyotishAPIHandler)._compute_rectification_v5_vedastro_validate(body)
+    if dated:
+        assert minute_dates == [(2000, 2, 29), (2000, 2, 29)]
 
     assert result["status"] == "pass"
     assert result["passed"] is True