Use the unified pydantic-settings configuration in run_llm

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tools/src/pop_fem_audit_tools/config.py

@@ -0,0 +1,48 @@
+# Tools for A Feminist Audit of Pop Music.
+# Copyright 2026 imacat.  All rights reserved.
+# Authors:
+#   imacat@mail.imacat.idv.tw (imacat), 2026/7/31
+"""The configuration.
+
+"""
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    """The configuration settings."""
+    app_name: str = "Tools for A Feminist Audit of Pop Music"
+    """The application name."""
+    admin_email: str = "imacat@mail.imacat.idv.tw"
+    """The administrator email address."""
+    SQLALCHEMY_DATABASE_URL: str
+    """The SQLAlchemy database URL."""
+    ANTHROPIC_API_KEY: str
+    """The Anthropic API key."""
+
+    model_config = SettingsConfigDict(env_file=".env", extra="ignore")
+    """The model configuration."""
+
+
+__settings: Settings | None = None
+"""The configuration settings."""
+
+
+def get_settings() -> Settings:
+    """Returns the configuration settings.
+
+    :return: The configuration settings.
+    """
+    global __settings
+    if __settings is None:
+        __settings = Settings()
+    return __settings
+
+
+def set_settings(settings: Settings) -> None:
+    """Sets the configuration settings.
+
+    :param settings: The configuration settings.
+    :return: None.
+    """
+    global __settings
+    __settings = settings