- Format server‑side validation errors for concurrency slot acquisition and improve API request handling (reject both root and account, distinct 401/403 errors).
- Fix multiple bugs: keep TaskRunRecorder flush alive, Windows git‑pull permission, RRULE UTC anchor handling, reconnect events client checkpoint, and other stability issues.
- Add tests for utilities.math, refine external suspension loop, and update documentation (Prefect Server DB examples, AI contribution expectations, pull‑step ordering, and docstring parameter names).