orm made Relation::m_related NotNull

The Relation::m_query and TinyBuilder::m_query should also be NotNull,
but I can't make it work, compilation fails. 🫤

include/orm/tiny/relations/belongstomany.hpp

@@ -723,7 +723,7 @@ namespace Orm::Tiny::Relations
     template<class Model, class Related, class PivotType>
     void BelongsToMany<Model, Related, PivotType>::touch() const
     {
-        const auto &related = this->m_related;
+        const auto &related = this->m_related.get();
 
         const auto &key = related->getKeyName();
 

include/orm/tiny/relations/relation.hpp

@@ -190,7 +190,7 @@ namespace Relations
         /*! The parent model instance. */
         NotNull<Model *> m_parent;
         /*! The related model instance. */
-        std::shared_ptr<Related> m_related;
+        NotNull<std::shared_ptr<Related>> m_related;
         /*! The key name of the related model. */
         QString m_relatedKey;
         // TODO next would be good to use TinyBuilder alias instead of Builder silverqx