redteam bugfix for processing prompts (#43627)

Author: slister1001

sdk/evaluation/azure-ai-evaluation/azure/ai/evaluation/red_team/_orchestrator_manager.py

@@ -284,6 +284,9 @@ async def _prompt_sending_orchestrator(
                     else None
                 )
 
+                # Initialize processed_prompt with the original prompt as default
+                processed_prompt = prompt
+
                 # Determine how to handle the prompt based on target type and context fields
                 if isinstance(chat_target, _CallbackChatTarget):
                     # CallbackChatTarget: Always pass contexts via context_dict, embed in prompt content
@@ -511,6 +514,9 @@ async def _multi_turn_orchestrator(
                     ctx.get("content", "") if isinstance(ctx, dict) else str(ctx) for ctx in contexts
                 )
 
+            # Initialize processed_prompt with the original prompt as default
+            processed_prompt = prompt
+
             # Determine how to handle the prompt based on target type and context fields
             if isinstance(chat_target, _CallbackChatTarget):
                 # CallbackChatTarget: Always pass contexts via context_dict, embed in prompt content
@@ -756,6 +762,9 @@ async def _crescendo_orchestrator(
                     ctx.get("content", "") if isinstance(ctx, dict) else str(ctx) for ctx in contexts
                 )
 
+            # Initialize processed_prompt with the original prompt as default
+            processed_prompt = prompt
+
             # Determine how to handle the prompt based on target type and context fields
             if isinstance(chat_target, _CallbackChatTarget):
                 # CallbackChatTarget: Always pass contexts via context_dict, embed in prompt content