feat: add pydantic-settings configuration module

src/proxy_pool/config.py

@@ -0,0 +1,29 @@
+from functools import lru_cache
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        case_sensitive=False,
+    )
+
+    # Infrastructure
+    database_url: str
+    redis_url: str
+    secret_key: str
+
+    # Application
+    app_name: str = "proxy-pool"
+    log_level: str = "INFO"
+
+    # Database pool
+    db_pool_size: int = 10
+    db_max_overflow: int = 10
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()