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- Removed obsolete *_edge_cases test files superseded by structured tests.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/test_registry_edge_cases.py

@@ -1,4 +1,20 @@
-"""Edge case tests for tool registry."""
+"""Edge-case tests for ``alfred.agent.registry``.
+
+Covers unusual but legitimate signatures handled by the JSON-Schema
+extractor:
+
+- ``TestToolEdgeCases`` — direct ``Tool`` dataclass construction with
+  minimal and maximal field sets.
+- ``TestCreateToolFromFunctionEdgeCases`` — bare functions (no annotations,
+  no docstring), functions with only ``*args``/``**kwargs``, generic
+  ``list``/``dict`` annotations, ``Optional`` unwrapping.
+- ``TestMakeToolsEdgeCases`` — global registry construction with the live
+  ``Settings`` object: every registered tool has a callable ``func``, a
+  unique name, and a JSON-Schema-shaped ``parameters`` dict.
+
+Uses ``memory.ltm.workspace.download`` (the current API) when staging the
+filesystem-backed tools.
+"""
 
 import pytest
 
@@ -258,7 +274,7 @@ class TestToolExecution:
     def test_tool_returns_dict(self, memory, real_folder):
         """Should return dict from tool execution."""
         tools = make_tools(settings)
-        memory.ltm.download_folder = str(real_folder["downloads"])
+        memory.ltm.workspace.download = str(real_folder["downloads"])
 
         result = tools["list_folder"].func(folder_type="download")
 
@@ -267,7 +283,7 @@ class TestToolExecution:
     def test_tool_returns_status(self, memory, real_folder):
         """Should return status in result."""
         tools = make_tools(settings)
-        memory.ltm.download_folder = str(real_folder["downloads"])
+        memory.ltm.workspace.download = str(real_folder["downloads"])
 
         result = tools["list_folder"].func(folder_type="download")
 
@@ -295,7 +311,7 @@ class TestToolExecution:
     def test_tool_handles_extra_args(self, memory, real_folder):
         """Should handle extra arguments."""
         tools = make_tools(settings)
-        memory.ltm.download_folder = str(real_folder["downloads"])
+        memory.ltm.workspace.download = str(real_folder["downloads"])
 
         # Extra args should raise TypeError
         with pytest.raises(TypeError):