feat: format SQL code via sqlparse in the /format endpoint

pyproject.toml

@@ -13,6 +13,7 @@ dependencies = [
     "aiosqlite==0.21",
     "uvicorn[standard]>=0.38.0",
     "ruff>=0.15.17",
+    "sqlparse>=0.5.5",
 ]
 
 [dependency-groups]