fix: make openFeatureProvider an instance field instead of static

The static field caused all DevCycleLocalClient instances to share the
same DevCycleProvider, which is incorrect when clients have different
configurations. This aligns with DevCycleCloudClient's implementation.

Author: jonathannorris

src/main/java/com/devcycle/sdk/server/local/api/DevCycleLocalClient.java

@@ -325,21 +325,17 @@ public void clearHooks() {
         this.evalHooksRunner.clearHooks();
     }
 
-    private static DevCycleProvider openFeatureProvider = null;
+    private DevCycleProvider openFeatureProvider = null;
 
     /**
      * @return the OpenFeature provider for this client.
      */
     @Override
     public FeatureProvider getOpenFeatureProvider() {
         if (openFeatureProvider == null) {
-            synchronized (DevCycleLocalClient.class) {
-                if (openFeatureProvider == null) {
-                    openFeatureProvider = new DevCycleProvider(this);
-                }
-                PlatformData platformData = PlatformData.builder().sdkPlatform("java-of").build();
-                localBucketing.setPlatformData(platformData.toString());
-            }
+            openFeatureProvider = new DevCycleProvider(this);
+            PlatformData platformData = PlatformData.builder().sdkPlatform("java-of").build();
+            localBucketing.setPlatformData(platformData.toString());
         }
         return openFeatureProvider;
     }