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- Removed obsolete *_edge_cases test files superseded by structured tests.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

alfred/agent/llm/deepseek.py

@@ -6,7 +6,8 @@ from typing import Any
 import requests
 from requests.exceptions import HTTPError, RequestException, Timeout
 
-from alfred.settings import Settings, settings
+from alfred.settings import Settings
+from alfred.settings import settings as default_settings
 
 from .exceptions import LLMAPIError, LLMConfigurationError
 
@@ -36,6 +37,7 @@ class DeepSeekClient:
         Raises:
             LLMConfigurationError: If API key is missing
         """
+        self.settings = settings or default_settings
         self.api_key = api_key or self.settings.deepseek_api_key
         self.base_url = base_url or self.settings.deepseek_base_url
         self.model = model or self.settings.deepseek_model
@@ -96,7 +98,7 @@ class DeepSeekClient:
         payload = {
             "model": self.model,
             "messages": messages,
-            "temperature": settings.llm_temperature,
+            "temperature": self.settings.llm_temperature,
         }
 
         # Add tools if provided

alfred/agent/llm/ollama.py

@@ -7,6 +7,7 @@ import requests
 from requests.exceptions import HTTPError, RequestException, Timeout
 
 from alfred.settings import Settings
+from alfred.settings import settings as default_settings
 
 from .exceptions import LLMAPIError, LLMConfigurationError
 
@@ -46,11 +47,12 @@ class OllamaClient:
         Raises:
             LLMConfigurationError: If configuration is invalid
         """
-        self.base_url = base_url or settings.ollama_base_url
-        self.model = model or settings.ollama_model
-        self.timeout = timeout or settings.request_timeout
+        self.settings = settings or default_settings
+        self.base_url = base_url or self.settings.ollama_base_url
+        self.model = model or self.settings.ollama_model
+        self.timeout = timeout or self.settings.request_timeout
         self.temperature = (
-            temperature if temperature is not None else settings.llm_temperature
+            temperature if temperature is not None else self.settings.llm_temperature
         )
 
         if not self.base_url: