fix(db): prefer postgres config in production refs NOISSUE

ai_software_factory/config.py

@@ -66,6 +66,32 @@ class Settings(BaseSettings):
     DB_POOL_RECYCLE: int = 3600
     DB_POOL_TIMEOUT: int = 30
 
+    @property
+    def postgres_url(self) -> str:
+        """Get PostgreSQL URL with trimmed whitespace."""
+        return (self.POSTGRES_URL or "").strip()
+
+    @property
+    def postgres_env_configured(self) -> bool:
+        """Whether PostgreSQL was explicitly configured via environment variables."""
+        if self.postgres_url:
+            return True
+        postgres_env_keys = (
+            "POSTGRES_HOST",
+            "POSTGRES_PORT",
+            "POSTGRES_USER",
+            "POSTGRES_PASSWORD",
+            "POSTGRES_DB",
+        )
+        return any(bool(os.environ.get(key, "").strip()) for key in postgres_env_keys)
+
+    @property
+    def use_sqlite(self) -> bool:
+        """Whether SQLite should be used as the active database backend."""
+        if not self.USE_SQLITE:
+            return False
+        return not self.postgres_env_configured
+
     @property
     def pool(self) -> dict:
         """Get database pool configuration."""
@@ -79,8 +105,10 @@ class Settings(BaseSettings):
     @property
     def database_url(self) -> str:
         """Get database connection URL."""
-        if self.USE_SQLITE:
+        if self.use_sqlite:
             return f"sqlite:///{self.SQLITE_DB_PATH}"
+        if self.postgres_url:
+            return self.postgres_url
         return (
             f"postgresql://{self.POSTGRES_USER}:{self.POSTGRES_PASSWORD}"
             f"@{self.POSTGRES_HOST}:{self.POSTGRES_PORT}/{self.POSTGRES_DB}"
@@ -89,8 +117,10 @@ class Settings(BaseSettings):
     @property
     def test_database_url(self) -> str:
         """Get test database connection URL."""
-        if self.USE_SQLITE:
+        if self.use_sqlite:
             return f"sqlite:///{self.SQLITE_DB_PATH}"
+        if self.postgres_url:
+            return self.postgres_url
         return (
             f"postgresql://{self.POSTGRES_USER}:{self.POSTGRES_PASSWORD}"
             f"@{self.POSTGRES_HOST}:{self.POSTGRES_PORT}/{self.POSTGRES_TEST_DB}"