8.18.1 / 2025-09-08

• types: correct type inference for maps of maps #15602
• types(model): copy base model statics onto discriminator model #15623 #15600
• types: fix types for a string of enums #15605 ruiaraujo
• types(SchemaOptions): disallow versionKey: true, which fails at runtime #15606
• docs(typescript): add example explaining how to use query helper overrides for handling lean() #15622 #15601
• docs(transactions): add note about nested transactions #15624