PDE-4994 chore: release 15.15.0

[eliangcs]

I moved many of the older changelogs to a new directory changelog/, because the main CHANGELOG.md is getting too large.

The changelog for 15.15.0 is as follows.

Changelog

released 2024-09-18

This release introduces "Buffered Create Actions", currently only available for internal use. A Buffered Create allows you to create objects in bulk with a single or fewer API request(s). This is useful when you want to reduce the number of requests made to your server. When enabled, Zapier holds the data until the buffer reaches a size limit or a certain time has passed, then sends the buffered data using the performBuffer function you define.

cli

None!

core

• :test_tube: Add checks to support Buffered Create Actions (#832)

schema

• :test_tube: Add performBuffer and buffer to operation schema to support Buffered Create Actions (#832)

[eliangcs]

Wonder if we should leave a note in the main changelog about where to find older changelog files.

@standielpls I did that by adding some HTML anchors at the bottom. So for example, when a user clicks a link of v10.0.0 https://github.com/zapier/zapier-platform/blob/main/CHANGELOG.md#1000, they will be redirected to the Old Releases section at the bottom.