adapt peer event response re-triggering to align with ADK-1.18.0's more strict validation

Author: Eugene Navitaniuc

src/solace_agent_mesh/agent/sac/component.py

@@ -793,14 +793,7 @@ async def _retrigger_agent_with_peer_responses(
                 log_retrigger,
                 len(new_response_parts),
             )
-            new_adk_event = ADKEvent(
-                invocation_id=paused_invocation_id,
-                author=self.agent_name,
-                content=adk_types.Content(role="tool", parts=new_response_parts),
-            )
-            await self.session_service.append_event(
-                session=session, event=new_adk_event
-            )
+            new_tool_response_content = adk_types.Content(role="tool", parts=new_response_parts)
 
             # Always use SSE streaming mode for the ADK runner, even on re-trigger.
             # This ensures that real-time callbacks for status updates and artifact
@@ -818,7 +811,7 @@ async def _retrigger_agent_with_peer_responses(
             )
             try:
                 await run_adk_async_task_thread_wrapper(
-                    self, session, None, run_config, original_task_context
+                    self, session, new_tool_response_content, run_config, original_task_context, append_context_event=False
                 )
             finally:
                 log.info(