quality: Enhance synthesis by removing invisible context

From the user point of view.

Author: clemlesne

helpers/config_models/prompts.py

@@ -265,7 +265,14 @@ def sms_summary_system(
             self.sms_summary_system_tpl,
             claim=_pydantic_to_str(claim),
             conversation_lang=CONFIG.workflow.conversation_lang,
-            messages=_pydantic_to_str(messages),
+            messages=_pydantic_to_str(
+                [
+                    message
+                    for message in messages
+                    if message.persona is not MessagePersona.TOOL
+                ],
+                exclude={"tool_calls"},
+            ),  # Filter out tool messages, to avoid LLM to summarize invisible messages (from the user perspective)
             reminders=_pydantic_to_str(reminders),
         )
 
@@ -281,7 +288,14 @@ def synthesis_short_system(
             self.synthesis_short_system_tpl,
             claim=_pydantic_to_str(claim),
             conversation_lang=CONFIG.workflow.conversation_lang,
-            messages=_pydantic_to_str(messages),
+            messages=_pydantic_to_str(
+                [
+                    message
+                    for message in messages
+                    if message.persona is not MessagePersona.TOOL
+                ],
+                exclude={"tool_calls"},
+            ),  # Filter out tool messages, to avoid LLM to summarize invisible messages (from the user perspective)
             reminders=_pydantic_to_str(reminders),
         )
 
@@ -297,7 +311,15 @@ def synthesis_long_system(
             self.synthesis_long_system_tpl,
             claim=_pydantic_to_str(claim),
             conversation_lang=CONFIG.workflow.conversation_lang,
-            messages=_pydantic_to_str(messages),
+            messages=_pydantic_to_str(
+                [
+                    message
+                    for message in messages
+                    if message.persona is not MessagePersona.TOOL
+                ],
+                exclude={"tool_calls"},
+            ),  # Filter out tool messages, to avoid LLM to summarize invisible messages (from the user perspective)
+            reminders=_pydantic_to_str(reminders),
         )
 
     def citations(