address greptile review feedback (greploop iteration 3)

- bias_hallucination_estimator: forward remaining session routing options
  (on_sensitive_data, sensitive_data_route_to_model, sticky_session_routing)
- gemini: use continue pattern for null text guard in _extract_audio_response_from_parts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py

@@ -1542,8 +1542,10 @@ class VertexGeminiConfig(VertexAIBaseConfig, BaseConfig):
         for part in parts:
             if "text" in part:
                 text_content = part["text"]
+                if text_content is None:
+                    continue
                 # Check if text content contains audio data URI
-                if text_content is not None and text_content.startswith("data:audio") and ";base64," in text_content:
+                if text_content.startswith("data:audio") and ";base64," in text_content:
                     try:
                         if is_base64_encoded(text_content):
                             media_type, audio_data = text_content.split("data:")[1].split(";base64,")

litellm/proxy/guardrails/guardrail_hooks/bias_hallucination_estimator/__init__.py

@@ -51,6 +51,9 @@ def initialize_guardrail(
                 end_session_after_n_fails=getattr(litellm_params, "end_session_after_n_fails", None),
                 on_violation=getattr(litellm_params, "on_violation", None),
                 realtime_violation_message=getattr(litellm_params, "realtime_violation_message", None),
+                on_sensitive_data=getattr(litellm_params, "on_sensitive_data", None),
+                sensitive_data_route_to_model=getattr(litellm_params, "sensitive_data_route_to_model", None),
+                sticky_session_routing=getattr(litellm_params, "sticky_session_routing", True),
             ),
         ),
     )