Resolves conflicts between the async-job-cancellation feature added on
master and this branch's removal of the legacy explore_json pipeline:
kept the cancellation feature (_register_cancellable_job, cancel_job,
is_job_cancelled, the task_id/SIGUSR1 revoke wiring, and its tests) and
dropped the parts of it that only applied to submit_explore_json_job /
load_explore_json_into_cache, which this branch already deleted. Also
merged master's get_request_json_body() hardening in views/utils.py
and its abort-signal wiring in chartAction.ts (adapted to this
branch's already-simplified, useLegacyApi-free handleChartDataResponse
signature).
Claude Code