feat: 添加后端架构、计算模块及部署文档

backend/app/core/config.py

@@ -0,0 +1,28 @@
+from dataclasses import dataclass
+from functools import lru_cache
+import os
+
+
+def _int_env(name: str, default: int) -> int:
+    raw = os.getenv(name)
+    if raw is None or raw == "":
+        return default
+    return int(raw)
+
+
+@dataclass(frozen=True)
+class Settings:
+    app_name: str = os.getenv("APP_NAME", "YG Fine-Tune Platform API")
+    app_env: str = os.getenv("APP_ENV", "local")
+    api_prefix: str = os.getenv("API_PREFIX", "/api")
+    log_level: str = os.getenv("LOG_LEVEL", "INFO")
+    log_dir: str = os.getenv("LOG_DIR", "./logs")
+    log_file_prefix: str = os.getenv("LOG_FILE_PREFIX", "backend")
+    log_error_file_prefix: str = os.getenv("LOG_ERROR_FILE_PREFIX", "error")
+    log_max_bytes: int = _int_env("LOG_MAX_BYTES", 20 * 1024 * 1024)
+    log_retention_days: int = _int_env("LOG_RETENTION_DAYS", 10)
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()