chore: litellm version for pyproject

Author: zakahan

pyproject.toml

@@ -16,7 +16,7 @@ dependencies = [
     "a2a-sdk==0.3.7", # For Google Agent2Agent protocol
     "deprecated==1.2.18",
     "google-adk==1.19.0", # For basic agent architecture
-    "litellm==1.74.3", # For model inference
+    "litellm>=1.74.3", # For model inference
     "loguru==0.7.3", # For better logging
     "opentelemetry-exporter-otlp==1.37.0",
     "opentelemetry-instrumentation-logging>=0.56b0",