Bunch of changes

Author: slinkydeveloper

sdk-core/src/main/java/dev/restate/sdk/core/HandlerContextImpl.java

@@ -33,8 +33,6 @@ class HandlerContextImpl implements HandlerContextInternal {
 
   private static final Logger LOG = LogManager.getLogger(HandlerContextImpl.class);
 
-  private static final int CANCEL_HANDLE = 1;
-
   private final HandlerRequest handlerRequest;
   private final StateMachine stateMachine;
   private final @Nullable String objectKey;

sdk-core/src/main/java/dev/restate/sdk/core/HandlerContextInternal.java

@@ -49,6 +49,8 @@ void proposeRunFailure(
 
   void close();
 
+  void fail(Throwable throwable);
+
   // -- State machine introspection (used by logging propagator)
 
   /**