OGM-469 Moving associationKind and collectionRole from AssociationKey to AssociationKeyMetadata
OGM-469 Changing GridDialect#isStoredInEntityStructure() to take the AssociationKeyMetadata instead of a specific association key
OGM-269 - WIP - Providing means of session-level storage to grid dialect operations
OGM-469 Extracting contexts with constant information per tuple/association type
OGM-469 - WIP - Pre-loading embedded associations in MongoDB