ACU: Crash at end of boresight command

On satp1 this morning I aborted a schedule in preparation for site hand off. I sent the telescope to 180, 60, spun down the HWP, then rotated to -30 in boresight all via ocs-web. The rotation seemed to work, it made it to -30, but at the end errored out with:

2025-04-30T13:18:07+0000 start called for go_to
2025-04-30T13:18:07+0000 go_to:701 Status is now "starting".
2025-04-30T13:18:07+0000 go_to:701 Status is now "running".
2025-04-30T13:18:07+0000 Clearing faults to prepare for motion.
2025-04-30T13:18:08+0000 Requested position: az=180.0, el=60.0
2025-04-30T13:18:08+0000 Azimuth.state=INIT             dt=  0.000 dist=  28.500
2025-04-30T13:18:09+0000 Azimuth.state=WAIT_MOVING      dt=  0.101 dist=  28.490
2025-04-30T13:18:09+0000 Azimuth.state=WAIT_STILL       dt=  0.202 dist=  28.476
2025-04-30T13:18:09+0000 Ignoring requested motion on Elevation
2025-04-30T13:18:29+0000 Azimuth.state=DONE             dt= 20.518 dist=   0.004
2025-04-30T13:18:30+0000 go_to:701 Move complete.
2025-04-30T13:18:30+0000 go_to:701 Status is now "done".
2025-04-30T13:18:30+0000 Azimuth_mode is now "Stop"
2025-04-30T13:31:40+0000 start called for set_boresight
2025-04-30T13:31:40+0000 set_boresight:702 Status is now "starting".
2025-04-30T13:31:40+0000 set_boresight:702 Status is now "running".
2025-04-30T13:31:40+0000 Clearing faults to prepare for motion.
2025-04-30T13:31:41+0000 Commanded position: boresight=-30.0
2025-04-30T13:31:41+0000 Boresight.state=INIT           dt=  0.000 dist=  30.000
2025-04-30T13:31:41+0000 Boresight.state=WAIT_MOVING    dt=  0.101 dist=  30.000
2025-04-30T13:31:41+0000 Boresight.state=WAIT_STILL     dt=  0.224 dist=  30.000
2025-04-30T13:31:52+0000 set_boresight:702 CRASH: [Failure instance: Traceback: <class 'twisted.internet.defer.CancelledError'>:
/opt/venv/lib/python3.10/site-packages/twisted/internet/defer.py:2013:_inlineCallbacks
/opt/venv/lib/python3.10/site-packages/twisted/python/failure.py:467:throwExceptionIntoGenerator
/opt/venv/lib/python3.10/site-packages/socs/agents/acu/agent.py:1483:set_boresight
/opt/venv/lib/python3.10/site-packages/twisted/internet/defer.py:2013:_inlineCallbacks
/opt/venv/lib/python3.10/site-packages/twisted/python/failure.py:467:throwExceptionIntoGenerator
/opt/venv/lib/python3.10/site-packages/socs/agents/acu/agent.py:1299:_go_to_axis
]
2025-04-30T13:31:52+0000 set_boresight:702 Status is now "done".

I did not check "Set mode=Stop at end?". This was with image tag: v0.5.2-49-gd23277f-dev

Start in socs/agents/acu/agent.py at set_boresight and _go_to_axis, following the CancelledError in the supplied traceback. Reproduce the telescope movement sequence through ocs-web with image tag v0.5.2-49-gd23277f-dev, then verify that the boresight command completes without crashing and reports the correct final status.