Check the progress a print reports, where a print already runs

Two tests already run a print end to end, and progress is a property of a
running print, so the checks go there rather than into a test of their own
that would cost the operator another job.

cloud.pause-resume takes the job that fits the ring: the client names the
length it is reporting against, and the operator is asked the question only a
person can answer, whether the bar actually moved.

cloud.oversize-stream takes the job that does not fit, which is where a moving
denominator would show: the kernel's program total grows all run long under a
live feed, and the test already samples it growing, so the check is that the
figure progress divides by is larger than that - the job, not the count the
ring had swallowed when the run started.

The forgetest replay plays a captured log from a build that predates the line,
so it carries the line where the current build emits it, as it already does
for the warm-up and the rest.

BRINGUP's cloud item now says a print reports itself again, and what is left
on it is a print watched from the app.

forgetest/tests/test_cloud_suite.py

@@ -37,6 +37,8 @@ WARM_UP_LINE = ("2026-08-17T09:44:02.100000+00:00 gfcloud[1522] INFO "
                 "machine:_dwell warm up: holding 3.0 s")
 COOL_DOWN_LINE = ("2026-08-17T09:45:31.700000+00:00 gfcloud[1522] INFO "
                   "machine:_dwell cool down: holding 10.0 s")
+PROGRESS_LINE = ("2026-08-17T09:44:05.200000+00:00 gfcloud[1522] INFO "
+                 "machine:__init__ print:progress: reporting against 47848 bytes every 30 s")
 
 
 def cut(lines, marker, count=1):
@@ -289,9 +291,10 @@ class CloudSuiteTests(unittest.TestCase):
         pre, rest = cut(lines, "waiting for button")
         run_pre, rest = cut(rest, "current state: MachineState.RUNNING")     # the PRINT's run
         # The excerpt was captured before the machine held for a warm-up and
-        # a rest; the replay carries those two lines where it emits them now,
-        # rather than editing what the machine actually said that day.
-        run_pre = run_pre + [WARM_UP_LINE]
+        # a rest, and before it reported a print's progress; the replay
+        # carries those lines where it emits them now, rather than editing
+        # what the machine actually said that day.
+        run_pre = run_pre + [WARM_UP_LINE, PROGRESS_LINE]
         pre, rest = pre + run_pre + [rest[0]], rest[1:]
         mid, tail = cut(rest, at_end)
         tail = tail + [COOL_DOWN_LINE]