chore: sprint cleanup — language unification, parser unification, fossils removal

Several weeks of work accumulated without being committed. Grouped here for
clarity; see CHANGELOG.md [Unreleased] for the user-facing summary.

Highlights
----------

P1 #2 — ISO 639-2/B canonical migration
- New Language VO + LanguageRegistry (alfred/domain/shared/knowledge/).
- iso_languages.yaml as single source of truth for language codes.
- SubtitleKnowledgeBase now delegates lookup to LanguageRegistry; subtitles.yaml
  only declares subtitle-specific tokens (vostfr, vf, vff, …).
- SubtitlePreferences default → ["fre", "eng"]; subtitle filenames written as
  {iso639_2b}.srt (legacy fr.srt still read via alias).
- Scanner: dropped _LANG_KEYWORDS / _SDH_TOKENS / _FORCED_TOKENS /
  SUBTITLE_EXTENSIONS hardcoded dicts.
- Fixed: 'hi' token no longer marks SDH (conflicted with Hindi alias).
- Added settings.min_movie_size_bytes (was a module constant).

P1 #3 — Release parser unification + data-driven tokenizer
- parse_release() is now the single source of truth for release-name parsing.
- alfred/knowledge/release/separators.yaml declares the token separators used
  by the tokenizer (., space, [, ], (, ), _). New conventions can be added
  without code changes.
- Tokenizer now splits on any configured separator instead of name.split('.').
  Releases like 'The Father (2020) [1080p] [WEBRip] [5.1] [YTS.MX]' parse via
  the direct path without sanitization fallback.
- Site-tag extraction always runs first; well-formedness only rejects truly
  forbidden chars.
- _parse_season_episode() extended with NxNN / NxNNxNN alt forms.
- Removed dead helpers: _sanitize, _normalize.

Domain cleanup
- Deleted fossil services with zero production callers:
    alfred/domain/movies/services.py
    alfred/domain/tv_shows/services.py
    alfred/domain/subtitles/services.py (replaced by subtitles/services/ package)
    alfred/domain/subtitles/repositories.py
- Split monolithic subtitle services into a package (identifier, matcher,
  placer, pattern_detector, utils) + dedicated knowledge/ package.
- MediaInfo split into dedicated package (alfred/domain/shared/media/:
  audio, video, subtitle, info, matching).

Persistence cleanup
- Removed dead JSON repositories (movie/subtitle/tvshow_repository.py).

Tests
- Major expansion of the test suite organized to mirror the source tree.
- Removed obsolete *_edge_cases test files superseded by structured tests.
- Suite: 990 passed, 8 skipped.

Misc
- .gitignore: exclude env_backup/ and *.bak.
- Adjustments across agent/llm, app.py, application/filesystem, and
  infrastructure/filesystem to align with the new domain layout.

tests/conftest.py

@@ -1,8 +1,23 @@
-"""Pytest configuration and shared fixtures."""
+"""Shared pytest fixtures for the Alfred test suite.
+
+Provides three categories of fixtures used across all test packages:
+
+1. **Isolation** — ``mock_memory_storage_dir`` (autouse) and ``temp_dir``
+   ensure no test ever touches the real ``data/`` directory.
+2. **Memory builders** — ``memory``, ``memory_with_config``,
+   ``memory_with_history``, ``memory_with_search_results``,
+   ``memory_with_library`` produce ``Memory`` instances in known states for
+   tests that consume the global singleton.
+3. **Test doubles** — ``mock_llm``, ``mock_llm_with_tool_call``,
+   ``mock_tmdb_client``, ``mock_knaben_client``, ``mock_qbittorrent_client``,
+   ``mock_deepseek``, and the filesystem fixture ``real_folder``.
+
+All memory fixtures use the current component-based LTM API:
+``ltm.library_paths.set(collection, path)`` and
+``ltm.workspace.download``/``torrent``. Legacy flat attributes
+(``movie_folder``, ``tvshow_folder``, ``download_folder``) no longer exist.
+"""
 
-# TODO: Moved directory, should not be necessary anymore but need to check !!
-# Ajouter le dossier parent (brain) au PYTHONPATH
-# sys.path.insert(0, str(Path(__file__).parent.parent))
 import shutil
 import sys
 import tempfile
@@ -49,11 +64,15 @@ def memory(temp_dir):
 
 @pytest.fixture
 def memory_with_config(memory):
-    """Memory with pre-configured folders."""
-    memory.ltm.download_folder = "/tmp/downloads"
-    memory.ltm.movie_folder = "/tmp/movies"
-    memory.ltm.tvshow_folder = "/tmp/tvshows"
-    memory.ltm.torrent_folder = "/tmp/torrents"
+    """Memory with pre-configured workspace and library paths.
+
+    Uses the current component-based LTM API. The values are arbitrary
+    placeholders — tests that care about the actual paths should override.
+    """
+    memory.ltm.workspace.download = "/tmp/downloads"
+    memory.ltm.workspace.torrent = "/tmp/torrents"
+    memory.ltm.library_paths.set("movies", "/tmp/movies")
+    memory.ltm.library_paths.set("tv_shows", "/tmp/tvshows")
     return memory
 
 
@@ -105,8 +124,12 @@ def memory_with_history(memory):
 
 @pytest.fixture
 def memory_with_library(memory):
-    """Memory with movies in library."""
-    memory.ltm.library["movies"] = [
+    """Memory pre-populated with movies and TV shows.
+
+    Uses the current ``Library`` component (``library.movies`` and
+    ``library.tv_shows`` lists of dicts).
+    """
+    memory.ltm.library.movies = [
         {
             "imdb_id": "tt1375666",
             "title": "Inception",
@@ -124,7 +147,7 @@ def memory_with_library(memory):
             "added_at": "2024-01-16T14:20:00",
         },
     ]
-    memory.ltm.library["tv_shows"] = [
+    memory.ltm.library.tv_shows = [
         {
             "imdb_id": "tt0944947",
             "title": "Game of Thrones",