Match against exception causes in @⁠Retryable and RetryPolicy

Prior to this commit, our @⁠Retryable support as well as a RetryPolicy
created by the RetryPolicy.Builder only matched against top-level
exceptions when filtering included/excluded exceptions thrown by a
@⁠Retryable method or Retryable operation.

With this commit, we now match against not only top-level exceptions
but also nested causes within those top-level exceptions. This is
achieved via the new ExceptionTypeFilter.match(Throwable, boolean)
support.

See gh-35592
Closes gh-35583

spring-context/src/main/java/org/springframework/resilience/annotation/Retryable.java

@@ -40,6 +40,7 @@ import org.springframework.resilience.retry.MethodRetryPredicate;
  * project but redesigned as a minimal core retry feature in the Spring Framework.
  *
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 7.0
  * @see EnableResilientMethods
  * @see RetryAnnotationBeanPostProcessor
@@ -64,6 +65,9 @@ public @interface Retryable {
 	/**
 	 * Applicable exception types to attempt a retry for. This attribute
 	 * allows for the convenient specification of assignable exception types.
+	 * <p>The supplied exception types will be matched against an exception
+	 * thrown by a failed invocation as well as nested
+	 * {@linkplain Throwable#getCause() causes}.
 	 * <p>This can optionally be combined with {@link #excludes() excludes} or
 	 * a custom {@link #predicate() predicate}.
 	 * <p>The default is empty, leading to a retry attempt for any exception.
@@ -76,6 +80,9 @@ public @interface Retryable {
 	/**
 	 * Non-applicable exception types to avoid a retry for. This attribute
 	 * allows for the convenient specification of assignable exception types.
+	 * <p>The supplied exception types will be matched against an exception
+	 * thrown by a failed invocation as well as nested
+	 * {@linkplain Throwable#getCause() causes}.
 	 * <p>This can optionally be combined with {@link #includes() includes} or
 	 * a custom {@link #predicate() predicate}.
 	 * <p>The default is empty, leading to a retry attempt for any exception.

spring-context/src/main/java/org/springframework/resilience/retry/MethodRetrySpec.java

@@ -65,7 +65,7 @@ public record MethodRetrySpec(
 
 	MethodRetryPredicate combinedPredicate() {
 		ExceptionTypeFilter exceptionFilter = new ExceptionTypeFilter(this.includes, this.excludes);
-		return (method, throwable) -> exceptionFilter.match(throwable) &&
+		return (method, throwable) -> exceptionFilter.match(throwable, true) &&
 				this.predicate.shouldRetry(method, throwable);
 	}