fix: ruff/mypyエラー修正 (E402, F401, F841, E741, E731, 型エラー)

- E402: インポート順序修正（ロガー初期化をインポート完了後に移動）
- F401: 未使用インポート削除（Dict in json_repository/__init__.py）
- F841: 未使用変数修正（テストファイル）
- E741: 曖昧な変数名修正（l → level_name）
- E731: lambda式をdef関数に変更
- mypy型エラー: castを使用して型アサーション追加
- StructuredLoggerにinfoメソッド追加

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: web-flow

EpisodicRAG/CHANGELOG.md

@@ -98,6 +98,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ---
 
+<details>
+<summary>Archive (v2.x and earlier)</summary>
+
 ## [2.3.0] - 2025-11-28
 
 ### Breaking Changes
@@ -434,6 +437,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Provisional/Regular Digest生成
 - まだらボケ検出機能
 
+</details>
+
 ---
 
 ## バージョニング規則

EpisodicRAG/scripts/application/finalize/persistence.py

@@ -7,12 +7,11 @@
 """
 
 from pathlib import Path
-from typing import Callable, List, Optional
+from typing import Callable, List, Optional, cast
 
 from application.grand import GrandDigestManager, ShadowGrandDigestManager
 from application.tracking import DigestTimesTracker
 from config import DigestConfig
-from domain.validators import is_valid_dict
 from domain.constants import (
     LEVEL_CONFIG,
     LOG_PREFIX_DECISION,
@@ -22,8 +21,15 @@
 from domain.error_formatter import get_error_formatter
 from domain.exceptions import DigestError, FileIOError, ValidationError
 from domain.level_registry import get_level_registry
-from domain.types import RegularDigestData, as_dict
-from infrastructure import get_default_confirm_callback, get_structured_logger, log_debug, log_warning, save_json
+from domain.types import OverallDigestData, RegularDigestData, as_dict
+from domain.validators import is_valid_dict
+from infrastructure import (
+    get_default_confirm_callback,
+    get_structured_logger,
+    log_debug,
+    log_warning,
+    save_json,
+)
 
 _logger = get_structured_logger(__name__)
 
@@ -124,7 +130,7 @@ def update_grand_digest(
             formatter = get_error_formatter()
             raise DigestError(formatter.validation.validation_error("RegularDigest", "has no valid overall_digest", None))
         # GrandDigestManager.update_digestは例外を投げる（失敗時）
-        self.grand_digest_manager.update_digest(level, new_digest_name, overall_digest)
+        self.grand_digest_manager.update_digest(level, new_digest_name, cast(OverallDigestData, overall_digest))
 
     def _update_shadow_cascade(self, level: str) -> None:
         """

EpisodicRAG/scripts/application/finalize/provisional_loader.py

@@ -11,7 +11,6 @@
 
 from application.grand import ShadowGrandDigestManager
 from config import DigestConfig
-from domain.validators import is_valid_dict
 from domain.constants import (
     LEVEL_CONFIG,
     LOG_PREFIX_DECISION,
@@ -22,7 +21,14 @@
 from domain.error_formatter import get_error_formatter
 from domain.exceptions import DigestError
 from domain.types import IndividualDigestData, OverallDigestData
-from infrastructure import get_structured_logger, load_json, log_debug, log_warning, try_read_json_from_file
+from domain.validators import is_valid_dict
+from infrastructure import (
+    get_structured_logger,
+    load_json,
+    log_debug,
+    log_warning,
+    try_read_json_from_file,
+)
 
 _logger = get_structured_logger(__name__)
 

EpisodicRAG/scripts/application/finalize/shadow_validator.py

@@ -9,11 +9,11 @@
 from typing import Any, Callable, List, Optional, Tuple
 
 from application.grand import ShadowGrandDigestManager
-from domain.validators import is_valid_dict, is_valid_list
 from domain.error_formatter import get_error_formatter
 from domain.exceptions import DigestError, ValidationError
 from domain.file_naming import extract_file_number
 from domain.types import OverallDigestData
+from domain.validators import is_valid_dict, is_valid_list
 from infrastructure import get_default_confirm_callback, get_structured_logger, log_warning
 
 _logger = get_structured_logger(__name__)

EpisodicRAG/scripts/application/grand/grand_digest.py

@@ -37,9 +37,9 @@
 """
 
 from datetime import datetime
+from typing import cast
 
 from config import DigestConfig
-from domain.validators import is_valid_dict
 from domain.constants import (
     LEVEL_NAMES,
     LOG_PREFIX_STATE,
@@ -48,6 +48,7 @@
 from domain.error_formatter import get_error_formatter
 from domain.exceptions import DigestError
 from domain.types import GrandDigestData, OverallDigestData, as_dict
+from domain.validators import is_valid_dict
 from domain.version import DIGEST_FORMAT_VERSION
 from infrastructure import get_structured_logger, load_json_with_template, log_debug, save_json
 
@@ -169,5 +170,5 @@ def update_digest(
         log_debug(f"{LOG_PREFIX_STATE} updated_timestamp: {grand_data['metadata']['last_updated']}")
 
         # 保存
-        self.save(grand_data)
+        self.save(cast(GrandDigestData, grand_data))
         _logger.info(f"Updated GrandDigest.txt for level: {level}")

EpisodicRAG/scripts/application/shadow/cascade_processor.py

@@ -49,16 +49,16 @@
 from domain.validators import is_valid_overall_digest
 from infrastructure import get_structured_logger
 
-# 構造化ロガー
-_logger = get_structured_logger(__name__)
-
 from .file_detector import FileDetector
 from .shadow_io import ShadowIO
 from .template import ShadowTemplate
 
 if TYPE_CHECKING:
     from .file_appender import FileAppender
 
+# 構造化ロガー
+_logger = get_structured_logger(__name__)
+
 
 class CascadeProcessor:
     """

EpisodicRAG/scripts/application/shadow/file_appender.py

@@ -18,14 +18,14 @@
     try_read_json_from_file,
 )
 
-# 構造化ロガー
-_logger = get_structured_logger(__name__)
-
 from .file_detector import FileDetector
 from .placeholder_manager import PlaceholderManager
 from .shadow_io import ShadowIO
 from .template import ShadowTemplate
 
+# 構造化ロガー
+_logger = get_structured_logger(__name__)
+
 
 class FileAppender:
     """ファイル追加処理クラス"""

EpisodicRAG/scripts/application/shadow/shadow_updater.py

@@ -12,15 +12,15 @@
 from domain.types import LevelHierarchyEntry, OverallDigestData
 from infrastructure import get_structured_logger
 
-_logger = get_structured_logger(__name__)
-
 from .cascade_processor import CascadeProcessor
 from .file_appender import FileAppender
 from .file_detector import FileDetector
 from .placeholder_manager import PlaceholderManager
 from .shadow_io import ShadowIO
 from .template import ShadowTemplate
 
+_logger = get_structured_logger(__name__)
+
 
 class ShadowUpdater:
     """

EpisodicRAG/scripts/application/tracking/digest_times.py

@@ -11,10 +11,10 @@
 from typing import List, Optional, Union, cast
 
 from config import DigestConfig
-from domain.validators import is_valid_list
 from domain.constants import LEVEL_NAMES
 from domain.file_naming import extract_number_only, extract_numbers_formatted
 from domain.types import DigestTimesData
+from domain.validators import is_valid_list
 from infrastructure import get_structured_logger, load_json_with_template, log_warning, save_json
 
 _logger = get_structured_logger(__name__)

EpisodicRAG/scripts/config/__init__.py

@@ -52,22 +52,22 @@
 from pathlib import Path
 from typing import List, Literal, Optional
 
-# Config層専用の型・例外・エラーメッセージ
-from .exceptions import ConfigError
-from .types import ConfigData
-from .error_messages import initialization_failed_message
-
 # 内部コンポーネント
 from .config_loader import ConfigLoader
 
 # 後方互換性のため DirectoryValidator も公開（ConfigValidatorへのエイリアス）
 from .config_validator import ConfigValidator
 from .config_validator import DirectoryValidator as DirectoryValidator  # noqa: PLC0414
+from .error_messages import initialization_failed_message
+
+# Config層専用の型・例外・エラーメッセージ
+from .exceptions import ConfigError
 from .level_path_service import LevelPathService
 from .path_resolver import PathResolver
 from .plugin_root_resolver import find_plugin_root
 from .source_path_resolver import SourcePathResolver
 from .threshold_provider import ThresholdProvider
+from .types import ConfigData
 
 # Config層専用logger（Infrastructure層に依存しない）
 _logger = logging.getLogger("episodic_rag.config")