Adds an EXPERIMENTAL, operator-only alternative to the extended-sample
rotation-center click: instead of judging the center from a single
instant of live rotation, accumulate a max-projection composite while
lsamrot rotates continuously through a (tunable, default 360 deg)
sweep. Off-axis features smear into circular arcs; the common center
of curvature is the rotation axis, an easier target to click than one
live frame. No automatic circle fitting -- purely a visual aid feeding
the same _collect_click mechanism the production feature already uses.
Rotation is issued non-blocking via scans.mv() (new local wrapper,
sibling of this file's existing blocking umv()) and frames are grabbed
via get_last_image() in a single-threaded loop polling ScanReport.status
-- the same thing ScanReport.wait() does internally -- so no background
thread or device-server change is needed to grab frames while the motor
is actively moving. The composite is pushed to the GUI through the
camera's existing PreviewSignal (dev.cam_xeye.image), duty-cycling
live_mode_enabled off/on around each push so the background 5 Hz live
thread can't immediately overwrite it.
New entry point: lamni.xrayeye_rotation_center_calibration_smear_experimental().
Purely additive -- does not modify find_rotation_center()/_live_sweep()
or the two production entry points.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
