Suppress cppcheck warnings for CI compatibility

Add missingInclude suppression to prevent false positives on fresh CI checkouts where include paths are unresolved. Add inline suppression for constVariableReference warning where cppcheck cannot detect mutations without full include path resolution.

src/activities/settings/BleButtonMapActivity.cpp

@@ -46,6 +46,9 @@ void BleButtonMapActivity::onExit() {
 
 bool BleButtonMapActivity::assignCapturedKey(MappedInputManager::Button button) {
   const uint8_t btn = static_cast<uint8_t>(button);
+  // Mutated via std::replace_if below and through `slot`; cppcheck's CI parse
+  // (no include paths) can't see the writes and suggests const.
+  // cppcheck-suppress constVariableReference
   auto& map = SETTINGS.bleKeyMap;
   using Entry = CrossPointSettings::BleKeyMapEntry;
   const uint8_t kind = capturedKind;