Implement batch addition in SlidingBoundariesArchive

[btjanaka]

Description

When we implemented batch addition in #221, we skipped SlidingBoundariesArchive since it was complicated. This PR fixes that.

TODO

Questions

Status

• [ ] I have read the guidelines in CONTRIBUTING.md
• [ ] I have formatted my code using yapf
• [ ] I have tested my code by running pytest
• [ ] I have linted my code with pylint
• [ ] I have added a one-line description of my change to the changelog in HISTORY.md
• [ ] This PR is ready to go