fix(flomni): use cached read for sample-name poll in tomo params widget

The OMNY_TomoParams widget polled flomni_samples.sample_names.sample0
uncached every 2s to refresh a display label. Over a long interlock
lock this produced thousands of RPC calls, overflowing the client's
shared 100-entry request buffer (RequestStorage) and evicting a
pending scan request, which stalled the queue with no error. The
signal is auto-monitored and already live in Redis, so read it from
there instead of round-tripping to the device server.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GCaaQQSYGCbkAsRnALWC3h

csaxs_bec/bec_widgets/widgets/tomo_params/tomo_params.py

@@ -2351,7 +2351,7 @@ SETUP_PROFILES: dict[str, dict[str, Any]] = {
         "requested_to_stepsize": _requested_to_stepsize,
         "compute_fermat_positions": _compute_fermat_positions_flomni,
         "fermat_position_fields": ["tomo_shellstep", "fermat_asymmetry", "fovx", "fovy"],
-        "sample_name_getter": lambda w: w.dev.flomni_samples.sample_names.sample0.get(),
+        "sample_name_getter": lambda w: w.dev.flomni_samples.sample_names.sample0.get(cached=True),
         "cli_hint_name": "flomni",
     },
     "lamni": {