Pin litellm to latest safe release

Author: timothykassis

pyproject.toml

@@ -7,7 +7,7 @@ requires-python = ">=3.13"
 dependencies = [
     "fastapi>=0.133.1",
     "google-adk[extensions]>=1.27.4",
-    "litellm[proxy]==1.82.3",
+    "litellm[proxy]==1.82.6",
     "markitdown[all]>=0.1.5",
     "modal>=1.3.5",
     "openrouter>=0.7.11",