Refactor AI daily report pipeline

ai_daily_report/config.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from typing import Any
+
+from .models import SourceConfig
+from .pipeline import _source_config_from_dict
+
+
+def load_json(path: Path) -> Any:
+    return json.loads(path.read_text(encoding="utf-8"))
+
+
+def load_source_configs(path: Path) -> list[SourceConfig]:
+    raw = load_json(path)
+    if not isinstance(raw, list):
+        raise ValueError("sources config must be a list")
+    return [_source_config_from_dict(item) for item in raw]