fix: release already created pools on NewMultiPool failure

multipool.go

@@ -108,6 +108,10 @@ func NewMultiPool(size, sizePerPool int, lbs LoadBalancingStrategy, options ...O
 	for i := 0; i < size; i++ {
 		pool, err := NewPool(sizePerPool, options...)
 		if err != nil {
+			// Release all previously created pools to avoid resource leak
+			for j := 0; j < i; j++ {
+				pools[j].Release()
+			}
 			return nil, err
 		}
 		pools[i] = pool

multipool_func.go

@@ -55,6 +55,10 @@ func NewMultiPoolWithFunc(size, sizePerPool int, fn func(any), lbs LoadBalancing
 	for i := 0; i < size; i++ {
 		pool, err := NewPoolWithFunc(sizePerPool, fn, options...)
 		if err != nil {
+			// Release all previously created pools to avoid resource leak
+			for j := 0; j < i; j++ {
+				pools[j].Release()
+			}
 			return nil, err
 		}
 		pools[i] = pool

multipool_func_generic.go

@@ -51,6 +51,10 @@ func NewMultiPoolWithFuncGeneric[T any](size, sizePerPool int, fn func(T), lbs L
 	for i := 0; i < size; i++ {
 		pool, err := NewPoolWithFuncGeneric(sizePerPool, fn, options...)
 		if err != nil {
+			// Release all previously created pools to avoid resource leak
+			for j := 0; j < i; j++ {
+				pools[j].Release()
+			}
 			return nil, err
 		}
 		pools[i] = pool