test: revisit tests' first walk completes phase 3 before the second

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LVjrnpQjRgHdvq95rASoiR

tests/test_patreon_ingester.py

@@ -1366,7 +1366,7 @@ async def test_an_edited_post_inside_the_window_downloads_its_new_attachment(
     ing1.run(
         source_id=source_id, campaign_id="c1", artist_slug="ingest",
         url="https://patreon.com/ingest", mode="tick", revisit_days=30,
-    )
+    ).mark_seen_after_import()  # phase 3 ran
 
     hotfix = _media("p1", 2)
     client2 = _FakeClient(
@@ -1398,7 +1398,7 @@ async def test_a_post_below_the_horizon_keeps_its_capture_gate(
     ing1.run(
         source_id=source_id, campaign_id="c1", artist_slug="ingest",
         url="https://patreon.com/ingest", mode="tick", revisit_days=30,
-    )
+    ).mark_seen_after_import()  # phase 3 ran
 
     client2 = _FakeClient([(None, [("pold", [old])])], published={"pold": _iso(90)})
     downloader2 = _FakeDownloader(tmp_path)
@@ -1424,7 +1424,7 @@ async def test_a_revisit_that_finds_nothing_new_is_not_reported_as_an_update(
     ing1.run(
         source_id=source_id, campaign_id="c1", artist_slug="ingest",
         url="https://patreon.com/ingest", mode="tick", revisit_days=30,
-    )
+    ).mark_seen_after_import()  # phase 3 ran
 
     client2 = _FakeClient([(None, [("p1", [m])])], published={"p1": _iso(3)})
     downloader2 = _FakeDownloader(tmp_path)