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* fix(ci): serve the fast Java tier before full-tier lock holds (#15032) Co-authored-by: Qwen-Coder <[email protected]> * fix(ci): keep a parked lock head's ticket alive under fast priority A head blocked in `flock --wait` could not touch its ticket, so once a hold outlasted the 1800s mtime arm another waiter reaped a live head and the next ticket, whatever its class, parked in the kernel too. With two classes that lets normal tickets take kernel positions ahead of fast tickets that arrive later during a long hold. A keepalive now refreshes the parked head's ticket at the waiters' two-second cadence; it closes the lock fd and uses `touch -c`, so it can neither hold the lock nor recreate a removed ticket. The ordering and promotion cases used a stub whose `--wait` returned every 200 ms, so they exercised a head that loops, which production never does. They now park `--wait` until release and assert the reachable paths: a fast ticket overtaking a normal ticket that is still waiting, and a promoted waiting normal ticket preceding a later fast ticket. The comments and design docs no longer claim a fast job waits at most the hold already running (a parked head still goes first) or cite #14962/#15032 as fast-behind-full evidence; they state what priority removes and that a single hold longer than the budget is outside it. --------- Co-authored-by: Qwen Autofix <[email protected]> Co-authored-by: Qwen-Coder <[email protected]> Co-authored-by: wenshao <[email protected]>