feat(wiki): port upstream knowledge quality improvements

Selectively port source coverage and redirect lint, ignore-aware provenance, staging and trust checks from upstream 055d720. Preserve local archive metadata and adapt source-date and defuddle skill guidance.

Keep the existing skills directory, file index and MCP interfaces. Record per-module upstream baselines and exclusions without migrating vault data or changing services.

Validation: 625 tests passed; git diff --check passed.

tests/test_upstream_compat.py

@@ -83,3 +83,31 @@ def test_staging_cli_conflict_keeps_reviewed_and_live_files(tmp_path, capsys):
     ]) == 9
     assert live.read_text() == "Concurrent live update"
     assert staged.read_text() == "Reviewed proposal"
+
+
+@pytest.mark.parametrize("shape", ["dict", "list"])
+def test_source_coverage_accepts_local_archive_metadata_and_preserves_manifest(tmp_path, shape):
+    page = tmp_path / "concepts/a.md"
+    page.parent.mkdir()
+    page.write_text("---\ntitle: A\n---\n")
+    entries = [
+        {"path": "original.pdf", "archive_path": "_sources/archive/a.pdf",
+         "pages_produced": ["concepts/a.md"], "bjd_part_numbers": ["BJD-123"]},
+        {"path": "lost.pdf", "pages_updated": ["concepts/deleted.md"]},
+        {"path": "legacy.pdf", "pages_created": 2},
+    ]
+    manifest = tmp_path / ".manifest.json"
+    manifest.write_text(json.dumps({"sources": {e["path"]: e for e in entries} if shape == "dict" else entries}))
+    before = manifest.read_bytes()
+    report = lint_vault(tmp_path, require_trust_ledger=False)
+    assert report["findings"]["uncovered_sources"] == [
+        {"source": "lost.pdf", "issue": "pages_missing", "missing": ["concepts/deleted.md"]}
+    ]
+    assert manifest.read_bytes() == before
+
+
+def test_lint_cli_exposes_source_coverage_in_json_and_strict_exit(tmp_path, capsys):
+    (tmp_path / ".manifest.json").write_text(json.dumps({"sources": {"lost.pdf": {"pages_produced": []}}}))
+    assert main(["lint", str(tmp_path), "--json", "--strict"]) == 1
+    report = json.loads(capsys.readouterr().out)
+    assert report["stats"]["findings"]["uncovered_sources"] == 1