Put version reported to OSM into dev_config

lib/dev_config.dart

@@ -13,6 +13,10 @@ const double kDirectionConeBaseLength = 0.0012; // multiplier
 // Add Camera pin vertical offset (for pin tip to match coordinate on map)
 const double kAddPinYOffset = -16.0;
 
+// Client name and version for OSM uploads ("created_by" tag)
+const String kClientName = 'FlockMap';
+const String kClientVersion = '0.8.1';
+
 // Marker/camera interaction
 const int kCameraMinZoomLevel = 10; // Minimum zoom to show cameras or warning
 const Duration kMarkerTapTimeout = Duration(milliseconds: 250);