Merge branch 'mako_changes-20260806' into content-sizes

Brings in revision-level redirect detection and its regenerated
baselines. Conflicts were the expected adjacent insertions where both
branches extended the same seams (build_table and WikiqParser
signatures, the argparse block, the build_table call sites, and the
test file); resolved by keeping both branches' additions.

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

test/Wikiq_Unit_Test.py

@@ -527,6 +527,63 @@ def test_content_sizes_e2e():
     total = present["prose_chars"] + present["structured_chars"]
     assert (total <= present["text"].str.len()).all()
 
+def test_redirect_detection():
+    from wikiq.tables import RedirectDetector
+
+    detector = RedirectDetector()
+
+    # a plain redirect directive
+    assert detector.detect("#REDIRECT [[Target]]") == (True, "Target")
+
+    # localized aliases are only recognized when configured
+    assert detector.detect("#OMDIRIGERING [[Mål]]") == (False, None)
+    swedish = RedirectDetector(["OMDIRIGERING"])
+    assert swedish.detect("#OMDIRIGERING [[Mål]]") == (True, "Mål")
+    assert swedish.detect("#REDIRECT [[Target]]") == (True, "Target")
+
+    # fragment and label are stripped from the target
+    assert detector.detect("#REDIRECT [[Target#Section|label]]") == (True, "Target")
+
+    # leading whitespace and lowercase are accepted
+    assert detector.detect("  \n#redirect [[Target]]") == (True, "Target")
+
+    # each revision is classified by its own text
+    history = ["#REDIRECT [[A]]", "An article now.", "#REDIRECT [[B]]"]
+    assert [detector.detect(t) for t in history] == [
+        (True, "A"), (False, None), (True, "B"),
+    ]
+
+    # a directive that is not at the start of the text is not a redirect
+    assert detector.detect("Some text. #REDIRECT [[Target]]") == (False, None)
+
+def test_redirect_columns_e2e():
+    # revision-level redirect columns on a real dump: the ikwiki dump
+    # contains both redirect revisions and revisions with deleted text
+    tester = WikiqTester(IKWIKI, "redirect_columns")
+
+    try:
+        tester.call_wikiq()
+    except subprocess.CalledProcessError as exc:
+        pytest.fail(exc.stderr.decode("utf8"))
+
+    test = pd.read_table(tester.output)
+
+    assert "revision_is_redirect" in test.columns
+    assert "revision_redirect_target" in test.columns
+    assert "redirect_target" not in test.columns
+
+    # revisions with deleted text have null values in both columns
+    deleted = test[test["deleted"]]
+    assert len(deleted) > 0
+    assert deleted["revision_is_redirect"].isna().all()
+    assert deleted["revision_redirect_target"].isna().all()
+
+    # the dump contains real redirect revisions, and every detected
+    # redirect has a target
+    redirects = test[test["revision_is_redirect"] == True]
+    assert len(redirects) > 0
+    assert redirects["revision_redirect_target"].notna().all()
+
 def test_external_links_only():
     """Test that --external-links extracts external links correctly."""
     import mwparserfromhell