fix(adk): skip failover when error contains interrupt info (#1065)

In needFailover, check for compose.ExtractInterruptInfo before
proceeding with failover logic. Interrupt errors should not
trigger failover since they represent a pause/resume flow rather
than an actual failure.

Author: fanlv

adk/failover_chatmodel.go

@@ -26,6 +26,7 @@ import (
 	"github.com/cloudwego/eino/callbacks"
 	"github.com/cloudwego/eino/components"
 	"github.com/cloudwego/eino/components/model"
+	"github.com/cloudwego/eino/compose"
 	"github.com/cloudwego/eino/schema"
 )
 
@@ -240,6 +241,10 @@ func (f *failoverModelWrapper[M]) needFailover(ctx context.Context, outputMessag
 		return false
 	}
 
+	if _, ok := compose.ExtractInterruptInfo(outputErr); ok {
+		return false
+	}
+
 	// ErrStreamCanceled means the caller voluntarily abandoned the stream;
 	// never retry or fail over in this case.
 	if errors.Is(outputErr, ErrStreamCanceled) {