0efdb5e360
Change RigRxStatus.sig from i32 to f64 and add get_signal_strength_db to RigCat trait so SDR backends can bypass the coarse 0..15 quantisation. Compensate for decimation processing gain so the meter matches the spectrum peak. Display with one decimal place in all units. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Stan Grams <sjg@haxx.space>