forgetest: a press the fixture made and reported failed leaves no notice standing

press_now and arm_press hand the arm press to the operator when the
bench actuator reports that the press failed. When the box makes its
200 ms press and its reply is lost, the client raises that failure at
its 3 s timeout or later (with ip set in the config it does not
retry), and by then the controller has taken the press and put the
button out. The fallback put the notice up all the same and started
the watch, which waits for the button to light before it waits for it
to go out. The button does not light again, so "Press it now" stood
through the job and asked for a second press, and a press during the
job pauses it.

Both fallbacks now record the fixture's error and then read the
button. Out: the press was taken, it is recorded as the fixture's, and
no notice goes up. Lit, or unreadable: the notice goes up with its
watch, as before. Nothing presses for the operator, and no judge or
energy path changes.

Proof: forgetest-ci "Unit tests" (`python -B -m unittest discover -s
tests -v` in forgetest), on Ubuntu 24.04 with python 3.12 and on
Windows with python 3.14: test_fixture.py's
test_the_arm_notice_comes_down_when_the_press_is_taken gains the leg
where the box puts the button out and then reports a failure: press_now
returns True with no notice and the press recorded as the fixture's,
and arm_press leaves no notice and the same record. The file's 21
tests OK on Ubuntu, and on Windows with
test_ready_reads_a_short_press_as_an_edge skipped (no os.mkfifo).
test_setup_burns.py (22), test_setup_dark.py (20), test_server.py
(10), test_operator.py (17), test_queue.py (15) and test_mode.py (9)
OK on Ubuntu. Negative controls on scratch copies: the leg
against the runner as it was fails at press_now (False, the notice
standing); with arm_press's fallback alone as it was, the leg fails at
its record ('operator', the notice up). pyflakes reports no undefined
name.

Acceptance: every catalog test's fingerprint moves: runner.py is a
shared judge, in every implementation hash (43 of 43 move). Against
the campaign this series already needs, that adds no run: 850498f moved
all 43 once. tests/ are in none.

forgetest/tests/test_fixture.py

@@ -626,6 +626,25 @@ class RoutingTests(unittest.TestCase):
             time.sleep(0.2)
             lit["v"] = False
             self.assertTrue(settles(False))
+            # A press the box made and reported failed (its reply lost after
+            # the press): the button is out when the error arrives, so the
+            # press was taken, and no notice asks for a second one.
+            def pressed_then_failed(channel, state, ms=None):
+                lit["v"] = False                         # the controller takes the press
+                raise fx.FixtureError("timed out")
+            self.stub.act = pressed_then_failed
+            lit["v"] = True
+            self.assertTrue(ctx.press_now())
+            self.assertIsNone(run.notice)
+            self.assertEqual(ctx.evidence["actions"][-1]["by"], "fixture")
+            lit["v"] = True
+            self.assertTrue(ctx.arm_press())
+            deadline = time.time() + 2
+            while ctx.evidence["actions"][-1]["by"] != "fixture" and time.time() < deadline:
+                time.sleep(0.02)
+            time.sleep(0.1)
+            self.assertEqual(ctx.evidence["actions"][-1]["by"], "fixture")
+            self.assertIsNone(run.notice)
         finally:
             runner_mod.hw.button_lit = saved