Pin forgectrl 25cf969 and register the offset probe on the bench page

forgectrl 25cf969 lets status.c link without the cooling engine (the
image build compiles the status host tests), so the pin moves to it;
verified with bitbake -c fetch. offset_probe.py joins the bench-page
registry (survey, ladder and jog; the armed dwell stays a hand-run mode)
and takes "survey" as a mode word.

scripts/bench/offset_probe.py

@@ -357,7 +357,7 @@ def main():
     if len(sys.argv) > 1 and sys.argv[1] == 'armed':
         return run_armed()
     ladder = len(sys.argv) > 1 and sys.argv[1] == 'ladder'
-    repeat = int(sys.argv[1]) if len(sys.argv) > 1 and not ladder else 2
+    repeat = int(sys.argv[1]) if len(sys.argv) > 1 and sys.argv[1].isdigit() else 2
     attrs = {
         'exhaust': SYSFS + 'thermal/exhaust_pwm',
         'intake': SYSFS + 'thermal/intake_pwm',