v3.21.0

Work on this release was concentrated on two focus areas:

• @dsblank added additional API features that will power alternative web-based apps;
• @DavidMStraub improved handling of various error conditions that were surfaced through the improved logging added in v3.20.

Meanwhile, @elig-45 added an anniversary calendar subscription feature that will soon be available in the Gramps Web frontend.

API Changes

• Add exact before_id/after_id cursor for transaction history by @dsblank in #925
• Fast, structured POST .../query/ endpoints for every object type by @dsblank in #913
• Don't mutate the shared schema in validate_object_dict() by @dsblank in #926
• Reduce server load when polling the transaction history by @DavidMStraub in #927

Improved Error Handling

• Handle checksum key error by @DavidMStraub in #929
• More accurate handling of LLM errors by @DavidMStraub in #931
• Do not raise if media base dir does not exist by @DavidMStraub in #803
• Better error handling for invalid files by @DavidMStraub in #933
• Schema validation error detail by @DavidMStraub in #935
• Use pessimistic disconnect handling for user db by default by @DavidMStraub in #938

Other Improvements

• feat(api): add anniversaries ICS feed endpoint by @elig-45 in #792
• Use code exchange for OIDC by @DavidMStraub in #928

Full Changelog: v3.20.1...v3.21.0