parlament.press: an explicit backfill_days overrides the cursor

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/politrack/sources/parlament/news.py

@@ -48,7 +48,11 @@ class ParlamentPress(Adapter):
     def start(self, ctx: RunContext) -> Iterator[Request]:
         last = ctx.state.get("last_date")
         backfill = int(ctx.params.get("backfill_days", 365))
-        since = (date.fromisoformat(last) - timedelta(days=2)) if last else date.today() - timedelta(days=backfill)
+        # an explicit backfill_days (history backfill) wins over the cursor of the regular runs
+        if last and "backfill_days" not in ctx.params:
+            since = date.fromisoformat(last) - timedelta(days=2)
+        else:
+            since = date.today() - timedelta(days=backfill)
         yield list_request(110, {"DATERANGE": [since.isoformat(), date.today().isoformat()]}, kind="list",
                            meta={"since": since.isoformat()})