Improve data source, output mode selection

- Set output mode to single string. Specify output schema in prompt
  - Both thesee should encourage model to select only 1 output mode
    instead of encouraging it in prompt too many times
  - Output schema should also improve schema following in general
- Standardize variable, func name of io selector for readability
- Fix chat actors to test the io selector chat actor
- Make chat actor return sources, output separately for better
  disambiguation, at least during tests, for now

tests/test_openai_chat_director.py

@@ -8,7 +8,7 @@ from freezegun import freeze_time
 from khoj.database.models import Agent, Entry, KhojUser, LocalPdfConfig
 from khoj.processor.conversation import prompts
 from khoj.processor.conversation.utils import message_to_log
-from khoj.routers.helpers import aget_relevant_tools_to_execute
+from khoj.routers.helpers import aget_data_sources_and_output_format
 from tests.helpers import ConversationFactory
 
 # Initialize variables for tests
@@ -719,7 +719,7 @@ async def test_get_correct_tools_online(chat_client):
     user_query = "What's the weather in Patagonia this week?"
 
     # Act
-    tools = await aget_relevant_tools_to_execute(user_query, {}, False, False)
+    tools = await aget_data_sources_and_output_format(user_query, {}, False, False)
 
     # Assert
     tools = [tool.value for tool in tools]
@@ -734,7 +734,7 @@ async def test_get_correct_tools_notes(chat_client):
     user_query = "Where did I go for my first battleship training?"
 
     # Act
-    tools = await aget_relevant_tools_to_execute(user_query, {}, False, False)
+    tools = await aget_data_sources_and_output_format(user_query, {}, False, False)
 
     # Assert
     tools = [tool.value for tool in tools]
@@ -749,7 +749,7 @@ async def test_get_correct_tools_online_or_general_and_notes(chat_client):
     user_query = "What's the highest point in Patagonia and have I been there?"
 
     # Act
-    tools = await aget_relevant_tools_to_execute(user_query, {}, False, False)
+    tools = await aget_data_sources_and_output_format(user_query, {}, False, False)
 
     # Assert
     tools = [tool.value for tool in tools]
@@ -766,7 +766,7 @@ async def test_get_correct_tools_general(chat_client):
     user_query = "How many noble gases are there?"
 
     # Act
-    tools = await aget_relevant_tools_to_execute(user_query, {}, False, False)
+    tools = await aget_data_sources_and_output_format(user_query, {}, False, False)
 
     # Assert
     tools = [tool.value for tool in tools]
@@ -790,7 +790,7 @@ async def test_get_correct_tools_with_chat_history(chat_client):
     chat_history = generate_history(chat_log)
 
     # Act
-    tools = await aget_relevant_tools_to_execute(user_query, chat_history, False, False)
+    tools = await aget_data_sources_and_output_format(user_query, chat_history, False, False)
 
     # Assert
     tools = [tool.value for tool in tools]