Summary

Preserve full credit attribution in CHANGELOG.md for Slack streaming recipient-ID work:

• Main implementation: @Dithilli in fix(slack): pass recipient_team_id to streaming API calls #20988
• Prior groundwork: @AsserAl1012 in Fix Slack thread streaming missing recipient IDs (#20337) #20377

Greptile Summary

This PR preserves full credit attribution in CHANGELOG.md for Slack streaming recipient-ID work. The changelog entry now properly credits @Dithilli for the main implementation in #20988 and acknowledges @AsserAl1012's earlier groundwork in #20377. This is a documentation-only change that ensures proper contributor recognition without any functional impact.

Confidence Score: 5/5

• This PR is completely safe to merge with zero risk
• This is a documentation-only change that adds proper credit attribution to the CHANGELOG. The change correctly follows the repo's changelog format with proper markdown formatting (backticks around code elements, @ symbols properly handled), PR references, and contributor attribution. No code or functional changes are involved.
• No files require special attention

_{Last reviewed commit: da04544}