* refactor(docs): inline pandoc build into Makefile, drop scripts dir
* fix(agent): wait for deadline watcher before returning
readWithDeadline's watcher goroutine could clobber the conn's read
deadline with time.Unix(1, 0) after the main function reset it to zero.
When the Accept ctx was canceled shortly after Accept returned, the
watcher raced with close(done) in select and sometimes picked ctx.Done()
even though we were already done reading, leaving the conn unusable for
the next read (instant i/o timeout on step 1 snapshot).
Synchronize on the watcher's exit before resetting the deadline so it
can never override the reset.
* test(agent): cover readWithDeadline race on Accept ctx cancel
Drives Accept with a short-timeout ctx, cancels it right after Accept
returns, then does a Snapshot. Reliably fails without the readWithDeadline
synchronization fix (watcher goroutine overwrites the deadline to past).
Accept waits for an SDK HELLO then hands back a Conn. Conn.Snapshot
sends a PAUSE, blocks on the matching STATE (id-correlated), and
leaves the SDK paused until Release sends RESUME. Conn.Close sends
GOODBYE best-effort.
v0.1 supports one client at a time; transport is left to the caller
so tests can use TCP loopback while production wires via adb reverse
to localabstract:uatu-agent.
pj