Leftover from previous signal API PR (#623)

Author: slinkydeveloper

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

@@ -162,6 +162,27 @@ public CompletableFuture<AsyncResult<Void>> rejectPromise(String key, TerminalEx
         .thenCompose(Function.identity());
   }
 
+  @Override
+  public CompletableFuture<AsyncResult<Slice>> signal(String name) {
+    return CompletableFuture.supplyAsync(() -> super.signal(name), coreExecutor)
+        .thenCompose(Function.identity());
+  }
+
+  @Override
+  public CompletableFuture<Void> resolveSignal(String invocationId, String name, Slice payload) {
+    return CompletableFuture.supplyAsync(
+            () -> super.resolveSignal(invocationId, name, payload), coreExecutor)
+        .thenCompose(Function.identity());
+  }
+
+  @Override
+  public CompletableFuture<Void> rejectSignal(
+      String invocationId, String name, TerminalException reason) {
+    return CompletableFuture.supplyAsync(
+            () -> super.rejectSignal(invocationId, name, reason), coreExecutor)
+        .thenCompose(Function.identity());
+  }
+
   @Override
   public void proposeRunSuccess(int runHandle, Slice toWrite) {
     coreExecutor.execute(() -> super.proposeRunSuccess(runHandle, toWrite));