fix(tickers): let an SEC confirmation upgrade a manual delisting mark

mark_delisted returned early on any already-delisted row, so the sequence an
operator actually hits — mark EA by hand today, Form 25-NSE surfaces three days
later dated 2026-08-04 — left the estimated date and "manual" reason in place
permanently. Form 25 carries the real effective date, so it now replaces an
operator's estimate; a confirmed row is never downgraded or re-probed.

Also cover _get_ohlcv_priority_tickers, the one place active_only wraps a
compound select rather than a bare one — the unit suite reached none of it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/unit/test_ticker_delisting.py

@@ -181,3 +181,54 @@ async def test_confirm_delisting_waits_before_spending_a_request(session: AsyncS
     assert await ticker_service.confirm_delisting(
         session, "EA", last_bar=None, today=date(2026, 8, 11)
     ) is None
+
+
+async def test_sec_confirmation_upgrades_a_manual_mark(session: AsyncSession, monkeypatch):
+    """An operator's estimated date is a guess; Form 25 carries the real one."""
+    session.add(Ticker(symbol="EA", cik="0000712515"))
+    await session.commit()
+    await ticker_service.mark_delisted(session, "EA", delisted_on=date(2026, 8, 11))
+
+    monkeypatch.setattr(
+        ticker_service,
+        "_sec_client_factory",
+        lambda: _sec_client(_submissions(["25-NSE"], ["2026-08-04"])),
+        raising=False,
+    )
+    assert await ticker_service.confirm_delisting(
+        session, "EA", last_bar=date(2026, 8, 4), today=date(2026, 8, 11)
+    ) == date(2026, 8, 4)
+
+    row = (await session.execute(select(Ticker).where(Ticker.symbol == "EA"))).scalar_one()
+    assert row.delisted_on == date(2026, 8, 4)
+    assert row.delisted_reason == ticker_service.REASON_FORM_25
+
+
+async def test_a_confirmed_row_is_never_reprobed(session: AsyncSession, monkeypatch):
+    session.add(Ticker(symbol="EA", cik="0000712515"))
+    await session.commit()
+    await ticker_service.mark_delisted(
+        session, "EA", delisted_on=date(2026, 8, 4),
+        reason=ticker_service.REASON_FORM_25,
+    )
+
+    def _explode():
+        raise AssertionError("a SEC-confirmed row must not cost another request")
+
+    monkeypatch.setattr(ticker_service, "_sec_client_factory", _explode, raising=False)
+    assert await ticker_service.confirm_delisting(
+        session, "EA", last_bar=date(2026, 8, 4), today=date(2026, 9, 1)
+    ) is None
+
+
+async def test_ohlcv_priority_ordering_skips_delisted(session: AsyncSession):
+    """Covers the one statement where active_only wraps a compound select."""
+    from app.scheduler import _get_ohlcv_priority_tickers
+
+    session.add_all([Ticker(symbol="AAPL"), Ticker(symbol="EA"), Ticker(symbol="MSFT")])
+    await session.commit()
+    await ticker_service.mark_delisted(session, "EA", delisted_on=date(2026, 8, 4))
+
+    symbols = await _get_ohlcv_priority_tickers(session)
+    assert "EA" not in symbols
+    assert sorted(symbols) == ["AAPL", "MSFT"]