refactor(knowledge): extract YAML loaders from domain to infrastructure

The domain layer no longer reads YAML files. All knowledge loaders move
from `alfred/domain/*/knowledge/` to `alfred/infrastructure/knowledge/`:

  domain/release/knowledge.py
    → infrastructure/knowledge/release.py
  domain/shared/knowledge/language_registry.py
    → infrastructure/knowledge/language_registry.py
  domain/subtitles/knowledge/{loader,base}.py
    → infrastructure/knowledge/subtitles/{loader,base}.py

Callers in domain/release/{services,value_objects}.py,
domain/subtitles/{aggregates,services/*}.py, and
application/filesystem/manage_subtitles.py updated to absolute imports.
Re-exports of KnowledgeLoader/SubtitleKnowledgeBase from
domain/subtitles/__init__.py dropped (no shim per project convention).
Tests follow the moved targets.

alfred/application/filesystem/manage_subtitles.py

@@ -5,8 +5,8 @@ from pathlib import Path
 
 from alfred.domain.shared.value_objects import ImdbId
 from alfred.domain.subtitles.entities import SubtitleCandidate
-from alfred.domain.subtitles.knowledge.base import SubtitleKnowledgeBase
-from alfred.domain.subtitles.knowledge.loader import KnowledgeLoader
+from alfred.infrastructure.knowledge.subtitles.base import SubtitleKnowledgeBase
+from alfred.infrastructure.knowledge.subtitles.loader import KnowledgeLoader
 from alfred.domain.subtitles.services.identifier import SubtitleIdentifier
 from alfred.domain.subtitles.services.matcher import SubtitleMatcher
 from alfred.domain.subtitles.services.pattern_detector import PatternDetector

alfred/domain/release/services.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 import re
 
-from .knowledge import load_separators
+from alfred.infrastructure.knowledge.release import load_separators
 from .value_objects import (
     _AUDIO,
     _CODECS,

alfred/domain/release/value_objects.py

@@ -6,7 +6,7 @@ from dataclasses import dataclass, field
 from enum import Enum
 
 from ..shared.exceptions import ValidationError
-from .knowledge import (
+from alfred.infrastructure.knowledge.release import (
     load_audio,
     load_codecs,
     load_editions,

alfred/domain/shared/knowledge/__init__.py

@@ -1,5 +0,0 @@
-"""Shared knowledge loaders (cross-domain)."""
-
-from .language_registry import LanguageRegistry
-
-__all__ = ["LanguageRegistry"]

alfred/domain/subtitles/__init__.py

@@ -3,7 +3,6 @@
 from .aggregates import SubtitleRuleSet
 from .entities import MediaSubtitleMetadata, SubtitleCandidate
 from .exceptions import SubtitleNotFound
-from .knowledge import KnowledgeLoader, SubtitleKnowledgeBase
 from .services import PatternDetector, SubtitleIdentifier, SubtitleMatcher
 from .value_objects import (
     RuleScope,
@@ -20,8 +19,6 @@ __all__ = [
     "SubtitleCandidate",
     "MediaSubtitleMetadata",
     "SubtitleRuleSet",
-    "SubtitleKnowledgeBase",
-    "KnowledgeLoader",
     "SubtitleIdentifier",
     "SubtitleMatcher",
     "PatternDetector",

alfred/domain/subtitles/aggregates.py

@@ -3,8 +3,9 @@
 from dataclasses import dataclass, field
 from typing import Any
 
+from alfred.infrastructure.knowledge.subtitles.base import SubtitleKnowledgeBase
+
 from ..shared.value_objects import ImdbId
-from .knowledge.base import SubtitleKnowledgeBase
 from .value_objects import RuleScope, SubtitleMatchingRules
 
 

alfred/domain/subtitles/services/identifier.py

@@ -6,9 +6,10 @@ import re
 import subprocess
 from pathlib import Path
 
+from alfred.infrastructure.knowledge.subtitles.base import SubtitleKnowledgeBase
+
 from ...shared.value_objects import ImdbId
 from ..entities import MediaSubtitleMetadata, SubtitleCandidate
-from ..knowledge.base import SubtitleKnowledgeBase
 from ..value_objects import ScanStrategy, SubtitlePattern, SubtitleType
 
 logger = logging.getLogger(__name__)

alfred/domain/subtitles/services/pattern_detector.py

@@ -5,7 +5,8 @@ import logging
 import subprocess
 from pathlib import Path
 
-from ..knowledge.base import SubtitleKnowledgeBase
+from alfred.infrastructure.knowledge.subtitles.base import SubtitleKnowledgeBase
+
 from ..value_objects import ScanStrategy, SubtitlePattern
 
 logger = logging.getLogger(__name__)

alfred/infrastructure/knowledge/__init__.py

@@ -0,0 +1,6 @@
+"""Knowledge loaders — YAML I/O kept out of the domain layer.
+
+Each submodule reads its YAML files from ``alfred/knowledge/`` (builtin,
+versioned) and ``data/knowledge/`` (learned, gitignored), and exposes plain
+Python values (sets, dicts, classes) for domain code to consume.
+"""

alfred/infrastructure/knowledge/language_registry.py

@@ -13,7 +13,7 @@ import yaml
 
 import alfred as _alfred_pkg
 
-from ..value_objects import Language
+from alfred.domain.shared.value_objects import Language
 
 logger = logging.getLogger(__name__)
 

alfred/infrastructure/knowledge/subtitles/base.py

@@ -2,8 +2,8 @@
 
 import logging
 
-from ...shared.knowledge.language_registry import LanguageRegistry
-from ..value_objects import (
+from alfred.infrastructure.knowledge.language_registry import LanguageRegistry
+from alfred.domain.subtitles.value_objects import (
     ScanStrategy,
     SubtitleFormat,
     SubtitleLanguage,

tests/domain/test_subtitle_identifier.py

@@ -23,7 +23,7 @@ from unittest.mock import patch
 import pytest
 
 from alfred.domain.subtitles.entities import SubtitleCandidate
-from alfred.domain.subtitles.knowledge.base import SubtitleKnowledgeBase
+from alfred.infrastructure.knowledge.subtitles.base import SubtitleKnowledgeBase
 from alfred.domain.subtitles.services.identifier import (
     SubtitleIdentifier,
     _count_entries,

tests/domain/test_subtitle_knowledge.py

@@ -1,4 +1,4 @@
-"""Tests for ``alfred.domain.subtitles.knowledge`` (loader + base).
+"""Tests for ``alfred.infrastructure.knowledge.subtitles`` (loader + base).
 
 Covers:
 
@@ -19,9 +19,9 @@ from pathlib import Path
 
 import pytest
 
-from alfred.domain.subtitles.knowledge import loader as loader_mod
-from alfred.domain.subtitles.knowledge.base import SubtitleKnowledgeBase
-from alfred.domain.subtitles.knowledge.loader import KnowledgeLoader, _merge
+from alfred.infrastructure.knowledge.subtitles import loader as loader_mod
+from alfred.infrastructure.knowledge.subtitles.base import SubtitleKnowledgeBase
+from alfred.infrastructure.knowledge.subtitles.loader import KnowledgeLoader, _merge
 from alfred.domain.subtitles.value_objects import (
     ScanStrategy,
     SubtitleType,

tests/domain/test_subtitle_pattern_detector.py

@@ -25,7 +25,7 @@ from unittest.mock import patch
 
 import pytest
 
-from alfred.domain.subtitles.knowledge.base import SubtitleKnowledgeBase
+from alfred.infrastructure.knowledge.subtitles.base import SubtitleKnowledgeBase
 from alfred.domain.subtitles.services.pattern_detector import PatternDetector