Add query assist data summary agent template

[chishui]

Description

Add query assist data summary agent template

Related Issues

Check List

• [ ] New functionality includes testing.
• [ ] New functionality has been documented.
• [ ] API changes companion pull request created.
• [x] Commits are signed per the DCO using --signoff.
• [ ] Public documentation issue/PR created.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license. For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 77.55%. Comparing base (2513d49) to head (a17492f). Report is 9 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #875 +/- ## ========================================= Coverage 77.55% 77.55% Complexity 966 966 ========================================= Files 97 97 Lines 4531 4531 Branches 422 422 ========================================= Hits 3514 3514 Misses 835 835 Partials 182 182 ```

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[chishui]

LGTM. Please add a change log entry!

Added

[chishui]

@dbwiddis could you help merge this PR? Thanks

[dbwiddis]

@dbwiddis could you help merge this PR? Thanks

I've approved already. It takes two approvals. :)

We have a while before the next release, there is no rush.

[opensearch-trigger-bot[bot]]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/flow-framework/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/flow-framework/backport-2.x
# Create a new branch
git switch --create backport/backport-875-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 c1f5519fa7e5292d63bfc9afb38b475306b0a576
# Push it to GitHub
git push --set-upstream origin backport/backport-875-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/flow-framework/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-875-to-2.x.