POST /collections search

[jonhealy1]

Related Issue(s):

• POST /collections search #479

Description:

Added

• Environment variable ENABLE_COLLECTIONS_SEARCH_ROUTE to turn on/off the /collections-search endpoint.
• POST and GET /collections-search endpoint for collections search queries, needed because POST /collections search will not work when the Transactions Extension is enabled. Defaults to False.

Changed

• Refactored /collections endpoint implementation to support both GET and POST methods.

PR Checklist:

• Code is formatted and linted (run pre-commit run --all-files)
• Tests pass (run make test)
• Documentation has been updated to reflect changes, if applicable
• Changes are added to the changelog