Add Async block in assistant messages and make WHO ranking respect debug parameters

[zach-2pir]

This PR addresses two things.

1. The create_assistant_result internally spins off an asyncio task, but it does not await on it. Since it's called from an async context it can't switch to actually sending the results for a bit. This means the final chunk is sometimes not sent.
2. The ranking routine takes in query parameters to control score thresholds and max_results, but the whoRanking does not. This PR adds that.

[Copilot]

Pull Request Overview

This PR addresses two technical issues: fixing async message delivery in assistant results and ensuring WHO ranking respects debug parameters from URL query strings.

• Fixed async task execution by properly awaiting the create_assistant_result function instead of creating fire-and-forget tasks
• Modified WHO ranking to respect debug parameters like score thresholds and max results from query parameters
• Updated frontend to preserve URL debug parameters when making ranking requests

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
static/who.html	Extracts URL parameters and passes them to ranking requests to preserve debug settings
code/python/core/whoRanking.py	Updates ranking logic to use handler's max_results and min_score parameters instead of hardcoded values
code/python/core/schemas.py	Converts create_assistant_result to async function and properly awaits message sending
code/python/core/ranking.py	Updates call to create_assistant_result to use await instead of fire-and-forget task

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