fix(web): stop rectification interview when remaining minutes no longer split

Coverage-complete ties stayed in discrimination because whole-window D9/D24 follow-ups were treated as probes, and restated dates inserted duplicate evidence. Skip encoded remaining layers, ask leftover D4 or offer a provisional range, and dedupe dated rows by kind and date.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/rectification/event_probes.py

@@ -104,6 +104,11 @@ DOMAIN_CATALOG: dict[str, dict[str, Any]] = {
     },
 }
 
+# 入学年与高考通常同一学年或前后一年；存在性探针跳过邻近年，质量探针仍按精确年。
+EXISTENCE_NEARBY_YEARS = {
+    "education": 1,
+}
+
 
 def _clock(value: str) -> int:
     return int(value[:2]) * 60 + int(value[3:5])
@@ -505,6 +510,16 @@ def _event_years(events: Sequence[dict[str, Any]], domain: str) -> set[int]:
     return years
 
 
+def _existence_blocked_years(domain: str, known_years: set[int]) -> set[int]:
+    blocked = set(known_years)
+    span = int(EXISTENCE_NEARBY_YEARS.get(domain, 0))
+    if span <= 0:
+        return blocked
+    for year in known_years:
+        blocked.update(range(year - span, year + span + 1))
+    return blocked
+
+
 def _quality_probes(
     events: Sequence[dict[str, Any]],
     domains: Sequence[str],
@@ -644,10 +659,11 @@ def discriminating_event_probes(
             if domain not in DOMAIN_CATALOG:
                 continue
             known_years = _event_years(events, domain)
+            blocked_years = _existence_blocked_years(domain, known_years)
             boundary = sorted((vim_years | narayana_years) & set(range(lo, hi + 1)))
             found = None
             for year in boundary:
-                if year in known_years:
+                if year in blocked_years:
                     continue
                 found = _evaluate_year(
                     left, right, birth_date=birth_date, domain=domain, year=year, source="dasha_boundary",
@@ -656,7 +672,7 @@ def discriminating_event_probes(
                     break
             if found is None:
                 midpoint = _age_band_year(birth_year, domain, now)
-                if midpoint is not None and midpoint not in known_years:
+                if midpoint is not None and midpoint not in blocked_years:
                     found = _evaluate_year(
                         left, right, birth_date=birth_date, domain=domain, year=midpoint, source="dasha_activation",
                     )
@@ -675,7 +691,7 @@ def discriminating_event_probes(
             continue
         known_years = _event_years(events, domain)
         year = _age_band_year(birth_year, domain, now)
-        if year is None or year in known_years:
+        if year is None or year in _existence_blocked_years(domain, known_years):
             continue
         probes.append(_public_probe(
             year=year,