Pass user name to document and online search actors prompts

This should improve the quality of personal information extraction
from document and online sources. The user name is only used when it
is set

src/khoj/processor/conversation/openai/gpt.py

@@ -5,7 +5,7 @@ from typing import Dict, Optional
 
 from langchain.schema import ChatMessage
 
-from khoj.database.models import Agent
+from khoj.database.models import Agent, KhojUser
 from khoj.processor.conversation import prompts
 from khoj.processor.conversation.openai.utils import (
     chat_completion_with_backoff,
@@ -27,11 +27,13 @@ def extract_questions(
     temperature=0,
     max_tokens=100,
     location_data: LocationData = None,
+    user: KhojUser = None,
 ):
     """
     Infer search queries to retrieve relevant notes to answer user query
     """
     location = f"{location_data.city}, {location_data.region}, {location_data.country}" if location_data else "Unknown"
+    username = prompts.user_name.format(name=user.get_full_name()) if user and user.get_full_name() else ""
 
     # Extract Past User Message and Inferred Questions from Conversation Log
     chat_history = "".join(
@@ -59,6 +61,7 @@ def extract_questions(
         text=text,
         yesterday_date=(today - timedelta(days=1)).strftime("%Y-%m-%d"),
         location=location,
+        username=username,
     )
     messages = [ChatMessage(content=prompt, role="user")]