refactor: share the favorite store, tilt repeats and request timing log

- setMyPosition stored a new favorite the same way in each of its three
  tilt branches; storeMyPosition() now does it.  The plain-lift branch
  now emits its state even when the radio refuses the favorite, which is
  harmless since sendSetMy() has already put the old one back.
- tiltRepeats() replaces the repeated tiltmotor ? TILT_REPEATS : repeats.
- timeRequest's two timing log blocks share logRequestTime().

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

src/Somfy.h

@@ -216,6 +216,10 @@ class SomfyShade : public SomfyRemote {
     ShadeTxState tx;
     bool sendStop(int8_t dir, bool tilt);
     bool sendSetMy(uint16_t delayMs, float oldPos, float oldTiltPos);
+    // Makes pos/tiltPos the favorite and tells the motor to store it.
+    bool storeMyPosition(float pos, float tiltPos);
+    // Repeats for a tilt command, more for a separate tilt motor.
+    uint8_t tiltRepeats() const;
     void runToLimit(int8_t dir, bool tilt, uint32_t since);
   public:
     uint8_t roomId = 0;