execute_code ran the same unbounded _is_supervised_gateway_process() probe
ahead of every cell, so the wedge #111922 bounds in terminal_tool still hung
an execute_code call (and its cron slot) forever: share the cell's deadline
and fail closed with a retryable error when the probe renders no verdict.
Moving the terminal pre-exec guard onto a deadline worker made it blind to
/stop, which keys on the tool thread's ident: record the acting-for tid in a
contextvar (copied into the worker by run_bounded_sync) so is_interrupted()
on the worker honours the tool thread's bit too.
Floor the guard's share of the deadline at 30s so a short command timeout
does not turn the guard's own cold-start cost (imports, git probes under
load) into a refusal — tests/tools/test_terminal_error_redaction.py was red
on the branch for exactly that.
teknium1
30b22b54ae