implement a generic user_job_events table for tracking compute job creation
enforce configurable burst and sustained limits for PDF layout parsing
add admin panel controls for compute rate limiting and max upload size
update API routes to apply and record rate checks for PDF parse jobs
document new environment variables and admin settings for compute limits
improve IP extraction logic for rate limiting accuracy
add tests for request IP extraction and test namespace gating
This change introduces a robust mechanism to throttle expensive compute operations, such as PDF parsing, on a per-user basis. It provides both burst and sustained rate controls, with admin-tunable parameters and clear user feedback on throttling. The job event ledger enables accurate concurrency and rate enforcement, while new documentation and tests ensure maintainability and clarity.