fix: order by clause

[zrquan]

Why are these changes needed?

Bug fix: AttributeError: Neither 'InstrumentedAttribute' object nor 'Comparator' object associated with Message.created_at has an attribute 'created_at asc'

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://github.com/microsoft/autogen/blob/main/CONTRIBUTING.md to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.22%. Comparing base (6dc0a23) to head (932ae36).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7051      +/-   ##
==========================================
- Coverage   81.35%   81.22%   -0.13%     
==========================================
  Files         244      244              
  Lines       18512    18512              
==========================================
- Hits        15060    15036      -24     
- Misses       3452     3476      +24     

Flag	Coverage Δ
unittests	81.22% <ø> (ø)

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[Copilot]

Pull Request Overview

This PR fixes an AttributeError in the AutoGen Studio web application by correcting the order parameter syntax in a database query. The error occurred when trying to retrieve messages for a run due to an incorrectly formatted order-by clause.

Key Changes

• Fixed the order parameter syntax in the database query for retrieving run messages