Fix Jin10 calendar backfill, retries and withdrawn schedules

Refresh historical previews after the local day ends and isolate retries by date without resetting browser scheduling progress.

Preserve withdrawal and restoration revisions, exclude withdrawn fallback values, and cover the behavior with isolated regression checks.

backend/src/alphapulse/calendar/jin10_store.py

@@ -5,7 +5,7 @@ from sqlalchemy import select
 from sqlalchemy.dialects.postgresql import insert
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from alphapulse.calendar.jin10 import Entry, day_url
+from alphapulse.calendar.jin10 import LOCAL, Entry, day_url
 from alphapulse.calendar.service import record_revision
 from alphapulse.models import EconomicRelease
 from alphapulse.models.jin10 import Jin10SyncDay
@@ -43,7 +43,7 @@ async def save_entry(session: AsyncSession, entry: Entry, raw_id: int, now: date
         await session.flush()
         record_revision(session, row, raw_id)
         return
-    changed = row.values != values or row.scheduled_at != entry.at or row.title != entry.title
+    changed = row.values != values or row.scheduled_at != entry.at or row.title != entry.title or row.schedule_status != "scheduled"
     row.schedule_checked_at = row.last_checked_at = now
     row.error = None
     if row.first_received_at is None and received:
@@ -51,22 +51,42 @@ async def save_entry(session: AsyncSession, entry: Entry, raw_id: int, now: date
         changed = True
     if changed:
         row.title, row.scheduled_at, row.values = entry.title, entry.at, values
+        row.schedule_status = "scheduled"
         row.schedule_url = day_url(date.fromisoformat(meta["date"]))
         row.revision_no += 1
         record_revision(session, row, raw_id)
 
 
+async def withdraw_missing(session: AsyncSession, day: date, kind: str, entries: list[Entry], raw_id: int, now: datetime) -> None:
+    # Only a fully validated response may withdraw records from its own day/category.
+    seen = {entry.identity for entry in entries}
+    rows = await session.scalars(select(EconomicRelease).where(
+        EconomicRelease.source == "jin10",
+        EconomicRelease.values["_jin10"]["date"].as_string() == day.isoformat(),
+        EconomicRelease.values["_jin10"]["kind"].as_string() == kind,
+        EconomicRelease.schedule_status != "withdrawn",
+    ).with_for_update())
+    for row in rows:
+        if row.external_id not in seen:
+            row.schedule_status = "withdrawn"
+            row.schedule_checked_at = row.last_checked_at = now
+            row.revision_no += 1
+            record_revision(session, row, raw_id)
+
+
 async def mark_day(session: AsyncSession, day: date, counts: dict, now: datetime) -> None:
     stmt = insert(Jin10SyncDay).values(day=day, captured_at=now, counts=counts)
     await session.execute(stmt.on_conflict_do_update(index_elements=["day"], set_={"captured_at": now, "counts": counts}))
 
 
-async def next_history_day(session: AsyncSession, start: date, end: date) -> date | None:
+async def next_history_day(session: AsyncSession, start: date, end: date, *, excluded: set[date] | None = None) -> date | None:
     from datetime import timedelta
-    covered = set(await session.scalars(select(Jin10SyncDay.day).where(Jin10SyncDay.day.between(start, end))))
+    snapshots = await session.scalars(select(Jin10SyncDay).where(Jin10SyncDay.day.between(start, end)))
+    # A preview captured before the local day ended is not a completed historical snapshot.
+    covered = {row.day for row in snapshots if row.captured_at.astimezone(LOCAL).date() > row.day}
     day = start
     while day <= end:
-        if day not in covered:
+        if day not in covered and day not in (excluded or set()):
             return day
         day += timedelta(days=1)
     return None