feat(movies): sync_movie populates library index from TMDB

Parallel to sync_show. Calls TMDBClient.get_movie_info,
combines the TmdbMovieInfo with the on-disk MovieRelease loaded
via DotAlfredMovieReleaseRepository.load_by_tmdb_id, and upserts
into DotAlfredMovieLibraryIndex.

Policy mirrors sync_show with two adaptations specific to movies:
* placeholder signature is name == metadata.path (auto-heal writes
  them equal — the schema requires name to be non-empty so we can't
  use name == "" as the spec originally suggested),
* when the per-movie sidecar is gone but the index entry remains,
  sync warns and returns the existing entry unchanged (no upsert
  possible without a release: index.upsert requires folder/imdb_id
  from the MovieRelease itself).

Raises MovieNotFoundInLibrary when neither index nor sidecar
carry tmdb_id.

tests/application/movies/test_sync.py

@@ -0,0 +1,222 @@
+"""Tests for ``sync_movie`` — TMDB sync orchestrator for movies."""
+
+from __future__ import annotations
+
+import logging
+from datetime import timedelta
+
+import pytest
+
+from alfred.application.exceptions import MovieNotFoundInLibrary
+from alfred.application.movies.sync import sync_movie
+from alfred.domain.shared.value_objects import TmdbId
+from alfred.infrastructure.api.tmdb.dto import TmdbMovieInfo
+from alfred.infrastructure.persistence.dot_alfred.v2.repository import (
+    DotAlfredMovieLibraryIndex,
+    DotAlfredMovieReleaseRepository,
+)
+
+
+class _StubTMDBClient:
+    """Minimal stand-in implementing only ``get_movie_info``."""
+
+    def __init__(self, info: TmdbMovieInfo) -> None:
+        self._info = info
+        self.calls: list[int] = []
+
+    def get_movie_info(self, tmdb_id: int) -> TmdbMovieInfo:
+        self.calls.append(tmdb_id)
+        return self._info
+
+
+@pytest.fixture
+def tmdb_info_fresh() -> TmdbMovieInfo:
+    """TMDB payload returned by the stub — distinct from any placeholder."""
+    return TmdbMovieInfo(
+        tmdb_id=27205,
+        imdb_id="tt1375666",
+        title="Inception",
+        release_year=2010,
+    )
+
+
+def _make_index_and_repos(movie_library):
+    repo = DotAlfredMovieReleaseRepository(movie_library)
+    index = DotAlfredMovieLibraryIndex(movie_library, release_repo=repo)
+    return repo, index
+
+
+# ════════════════════════════════════════════════════════════════════════════
+# Happy paths
+# ════════════════════════════════════════════════════════════════════════════
+
+
+class TestSyncMovieRefreshesPlaceholder:
+    def test_placeholder_entry_refreshes_regardless_of_ttl(
+        self, movie_library, inception_release, tmdb_info_fresh, now_utc
+    ):
+        repo, index = _make_index_and_repos(movie_library)
+        repo.save(inception_release)
+        client = _StubTMDBClient(tmdb_info_fresh)
+
+        result = sync_movie(
+            movie_library,
+            tmdb_id=TmdbId(27205),
+            index=index,
+            release_repo=repo,
+            tmdb_client=client,
+            ttl_days=365,
+            now=lambda: now_utc,
+        )
+        assert client.calls == [27205]
+        assert result.name == "Inception"
+        assert result.release_year == 2010
+
+
+class TestSyncMovieTTLGate:
+    def test_fresh_entry_within_ttl_is_noop(
+        self, movie_library, inception_release, tmdb_info_fresh, now_utc
+    ):
+        repo, index = _make_index_and_repos(movie_library)
+        repo.save(inception_release)
+        client = _StubTMDBClient(tmdb_info_fresh)
+        sync_movie(
+            movie_library,
+            tmdb_id=TmdbId(27205),
+            index=index,
+            release_repo=repo,
+            tmdb_client=client,
+            ttl_days=14,
+            now=lambda: now_utc,
+        )
+        first = len(client.calls)
+        later = now_utc + timedelta(days=3)
+        result = sync_movie(
+            movie_library,
+            tmdb_id=TmdbId(27205),
+            index=index,
+            release_repo=repo,
+            tmdb_client=client,
+            ttl_days=14,
+            now=lambda: later,
+        )
+        assert len(client.calls) == first
+        assert result.name == "Inception"
+
+    def test_stale_entry_past_ttl_refreshes(
+        self, movie_library, inception_release, tmdb_info_fresh, now_utc
+    ):
+        repo, index = _make_index_and_repos(movie_library)
+        repo.save(inception_release)
+        client = _StubTMDBClient(tmdb_info_fresh)
+        sync_movie(
+            movie_library,
+            tmdb_id=TmdbId(27205),
+            index=index,
+            release_repo=repo,
+            tmdb_client=client,
+            ttl_days=14,
+            now=lambda: now_utc,
+        )
+        first = len(client.calls)
+        later = now_utc + timedelta(days=20)
+        sync_movie(
+            movie_library,
+            tmdb_id=TmdbId(27205),
+            index=index,
+            release_repo=repo,
+            tmdb_client=client,
+            ttl_days=14,
+            now=lambda: later,
+        )
+        assert len(client.calls) == first + 1
+
+
+class TestSyncMovieForce:
+    def test_force_bypasses_ttl(
+        self, movie_library, inception_release, tmdb_info_fresh, now_utc
+    ):
+        repo, index = _make_index_and_repos(movie_library)
+        repo.save(inception_release)
+        client = _StubTMDBClient(tmdb_info_fresh)
+        sync_movie(
+            movie_library,
+            tmdb_id=TmdbId(27205),
+            index=index,
+            release_repo=repo,
+            tmdb_client=client,
+            ttl_days=14,
+            now=lambda: now_utc,
+        )
+        first = len(client.calls)
+        sync_movie(
+            movie_library,
+            tmdb_id=TmdbId(27205),
+            index=index,
+            release_repo=repo,
+            tmdb_client=client,
+            ttl_days=14,
+            now=lambda: now_utc,
+            force=True,
+        )
+        assert len(client.calls) == first + 1
+
+
+# ════════════════════════════════════════════════════════════════════════════
+# Degenerate paths
+# ════════════════════════════════════════════════════════════════════════════
+
+
+class TestSyncMovieMissingSidecar:
+    def test_indexed_movie_without_sidecar_logs_and_returns_existing(
+        self, movie_library, inception_release, tmdb_info_fresh, now_utc, caplog
+    ):
+        repo, index = _make_index_and_repos(movie_library)
+        repo.save(inception_release)
+        client = _StubTMDBClient(tmdb_info_fresh)
+        sync_movie(
+            movie_library,
+            tmdb_id=TmdbId(27205),
+            index=index,
+            release_repo=repo,
+            tmdb_client=client,
+            ttl_days=14,
+            now=lambda: now_utc,
+        )
+
+        # Wipe the per-movie sidecar.
+        (movie_library / inception_release.folder / ".alfred").unlink()
+
+        with caplog.at_level(logging.WARNING):
+            result = sync_movie(
+                movie_library,
+                tmdb_id=TmdbId(27205),
+                index=index,
+                release_repo=repo,
+                tmdb_client=client,
+                ttl_days=14,
+                now=lambda: now_utc,
+                force=True,
+            )
+        # Existing index entry returned unchanged — sync can't upsert
+        # without a release to source folder/imdb_id from.
+        assert result.name == "Inception"
+        assert any("per-movie sidecar missing" in r.message for r in caplog.records)
+
+
+class TestSyncMovieNotFound:
+    def test_no_index_entry_no_sidecar_raises(
+        self, movie_library, tmdb_info_fresh, now_utc
+    ):
+        repo, index = _make_index_and_repos(movie_library)
+        client = _StubTMDBClient(tmdb_info_fresh)
+        with pytest.raises(MovieNotFoundInLibrary, match="27205"):
+            sync_movie(
+                movie_library,
+                tmdb_id=TmdbId(27205),
+                index=index,
+                release_repo=repo,
+                tmdb_client=client,
+                ttl_days=14,
+                now=lambda: now_utc,
+            )