refactor: consolidate skill docs, add anti-drift tests, and apply audit fixes

DLO-13: Restructure vlm-library-workflow skill as safety contract layer.
- Rewrite SKILL.md (69 lines): safety contract, execution threshold semantics,
  six-step high-risk loop, decision rules, phase skeleton
- Delete redundant references (cli-reference, workflow, command-recipes, dev-guide)
- Add triage.md (failure mapping + preflight) and dev-map.md (module→test mapping)
- Add tests/test_docs_consistency.py: 78 parametrized tests verifying documented
  vlm commands exist in CLI registry
- Add CSV path mismatch test to test_plan_review.py (4th safety gate path)
- Delete vlm-expert.skill (Gemini package, 7 months stale) and README Gemini section

DLO-2 audit fixes: rate limiter injection, symmetric quarantine categories,
review-plan safety gates, parser improvements, planner validation.

CLI modularization: commands/ directory with one module per command group.

tests/test_planner.py

@@ -63,6 +63,92 @@ def test_generate_plan_for_movie_with_year(config):
     assert "Some Movie (2020)" in operation.reason
 
 
+
+def test_generate_plan_attaches_sidecar_context(tmp_path):
+    """Test move operations carry review-visible sidecar associations."""
+    config = Config(
+        library_root=tmp_path,
+        video_extensions=[".mp4", ".mkv", ".avi"],
+        movie_template="movie/{title} ({year})/",
+        movie_filename_template="{title} ({year}){ext}",
+    )
+
+    src_dir = tmp_path / "downloads"
+    src_dir.mkdir()
+    video = src_dir / "Movie (2020).mkv"
+    video.touch()
+    sub = src_dir / "Movie (2020).zh.srt"
+    sub.touch()
+    nfo = src_dir / "Movie (2020).nfo"
+    nfo.touch()
+    unrelated = src_dir / "Movie (2020).1.srt"
+    unrelated.touch()
+
+    video_file = VideoFile(
+        path=video,
+        filename=video.name,
+        size_bytes=1000000,
+        modified_timestamp=datetime.now(timezone.utc),
+        category="movie",
+    )
+    identity = MovieIdentity(
+        title="Movie",
+        year=2020,
+        confidence=0.9,
+        needs_review=False,
+        original_filename=video.name,
+    )
+
+    plan = generate_plan([(video_file, identity)], config)
+    operation = plan.operations[0]
+    assert operation.operation_type == "move"
+    sidecars = operation.review_context.get("sidecars")
+    assert sidecars is not None
+    assert [s["name"] for s in sidecars] == ["Movie (2020).nfo", "Movie (2020).zh.srt"]
+    dest_dir = operation.destination_path.parent
+    by_name = {s["name"]: s for s in sidecars}
+    assert by_name["Movie (2020).zh.srt"]["proposed_destination_path"] == str(dest_dir / "Movie (2020).zh.srt")
+    assert by_name["Movie (2020).nfo"]["proposed_destination_path"] == str(dest_dir / "Movie (2020).nfo")
+    # Numeric-suffix file must not be associated
+    assert all(s["name"] != "Movie (2020).1.srt" for s in sidecars)
+
+
+def test_generate_plan_no_sidecars_for_noop(tmp_path):
+    """Test no-op operations carry no sidecar context."""
+    config = Config(
+        library_root=tmp_path,
+        video_extensions=[".mp4", ".mkv", ".avi"],
+        movie_template="movie/{title} ({year})/",
+        movie_filename_template="{title} ({year}){ext}",
+    )
+
+    src_dir = tmp_path / "downloads"
+    src_dir.mkdir()
+    video = src_dir / "random_movie.mkv"
+    video.touch()
+    sub = src_dir / "random_movie.srt"
+    sub.touch()
+
+    video_file = VideoFile(
+        path=video,
+        filename=video.name,
+        size_bytes=1000000,
+        modified_timestamp=datetime.now(timezone.utc),
+        category="movie",
+    )
+    identity = MovieIdentity(
+        title="Random Movie",
+        year=None,
+        confidence=0.3,
+        needs_review=True,
+        original_filename=video.name,
+    )
+
+    plan = generate_plan([(video_file, identity)], config)
+    operation = plan.operations[0]
+    assert operation.operation_type == "no-op"
+    assert "sidecars" not in (operation.review_context or {})
+
 def test_generate_plan_for_movie_without_year(config):
     """Test plan generation for a movie without year (needs review)."""
     video_file = VideoFile(