PA calibration: wider PA range for TPU/TPE

PA_CALIBRATE takes PA_STEP (default 0.002, 0-0.098 over 50 lines).
_PA_CFG.material_pa_step uses 0.004 (0-0.196) for tpu/tpe/flex; soft TPU
measured 0.094, close to the old end. The "no result" rejection uses the
end of the range actually tested.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

macros/pressure_advance/bd_pressure.cfg

@@ -131,7 +131,10 @@ gcode:
     G4 P1000
     {% set y_step = 38.75 %}
     {% set pressure_ad = 0 %}
-    {% set pressure_step = 0.002 %}
+    # PA_STEP: PA increase per test line, 50 lines (0..49 x step); the
+    # vendor value 0.002 tests 0-0.098. bdpressure.py reports the VALUE
+    # sent with each reading, so a larger step widens the range.
+    {% set pressure_step = params.PA_STEP|default(0.002)|float %}
     
     G1 F{high_speed}
     G1 X78 Y{y_step} E9.92204