Add version history and bump project version to 0.19.0

backend/app/core/config.py

@@ -6,9 +6,16 @@ import os
 from pydantic_settings import BaseSettings
 
 
+ROOT_DIR = Path(__file__).parent.parent.parent.parent
+VERSION_FILE = ROOT_DIR / "VERSION"
+
+
 class Settings(BaseSettings):
     PROJECT_NAME: str = "Intelligent Planet Plan"
-    VERSION: str = "1.0.0"
+    VERSION: str = (
+        os.getenv("APP_VERSION")
+        or (VERSION_FILE.read_text(encoding="utf-8").strip() if VERSION_FILE.exists() else "0.19.0")
+    )
     API_V1_STR: str = "/api/v1"
     SECRET_KEY: str = "your-secret-key-change-in-production"
     ALGORITHM: str = "HS256"