feat(lamni): add step size to scilog_last_ptycho_scans summary line

Mirrors the same fix just applied to Flomni: tomo_shellstep was already
captured in every projection timing record but never surfaced in the
per-scan SciLog message. Add it next to FOV.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CpPtD7tCRwRZZnREhWcJi8

csaxs_bec/bec_ipython_client/plugins/LamNI/lamni.py

@@ -1134,12 +1134,14 @@ class LamNI(TomoQueueMixin, LamNIAlignmentMixin, LamNIOpticsMixin, LamniGuiTools
                 fovx = rec.get("lamni_piezo_range_x")
                 fovy = rec.get("lamni_piezo_range_y")
                 fov_str = f"{fovx} x {fovy} um" if fovx is not None and fovy is not None else "?"
+                step = rec.get("tomo_shellstep")
+                step_str = f"{step} um" if step is not None else "?"
                 exposure = rec.get("tomo_countingtime")
                 exp_str = f"{exposure} s" if exposure is not None else "?"
                 duration = rec.get("duration_s")
                 dur_str = self._format_duration(duration) if duration is not None else "?"
                 lines.append(
-                    f"scan {scan_str}: FOV {fov_str}, exposure {exp_str}, duration {dur_str}"
+                    f"scan {scan_str}: FOV {fov_str}, step {step_str}, exposure {exp_str}, duration {dur_str}"
                 )
 
         content = "\n".join(lines)