Add new infra architecture 13

shared/config/base.py

@@ -100,9 +100,33 @@ class BaseServiceSettings(BaseSettings):
     # DATABASE CONFIGURATION
     # ================================================================
 
-    # Note: DATABASE_URL is defined as a property in each service-specific config
-    # to construct the URL from secure environment variables
-    
+    # DATABASE_URL as a property - can be overridden by service-specific configs
+    # Base implementation reads from environment variable or builds from components
+    @property
+    def DATABASE_URL(self) -> str:
+        """Build database URL from environment or components.
+
+        Service-specific configs should override this property to use their
+        own service-specific environment variables (e.g., TENANT_DATABASE_URL).
+        """
+        # Try complete URL first
+        complete_url = os.getenv("DATABASE_URL")
+        if complete_url:
+            return complete_url
+
+        # Try to build from standard components
+        user = os.getenv("DB_USER", "")
+        password = os.getenv("DB_PASSWORD", "")
+        host = os.getenv("DB_HOST", "localhost")
+        port = os.getenv("DB_PORT", "5432")
+        name = os.getenv("DB_NAME", "")
+
+        if user and password and name:
+            return f"postgresql+asyncpg://{user}:{password}@{host}:{port}/{name}"
+
+        # Return empty string if not configured (will fail validation in production)
+        return ""
+
     # Database connection settings
     DB_POOL_SIZE: int = int(os.getenv("DB_POOL_SIZE", "10"))
     DB_MAX_OVERFLOW: int = int(os.getenv("DB_MAX_OVERFLOW", "20"))