添加支持设置 “Session.prefix”

### Problem I hope that the base class can be inherited by both Realm and other classes during use. When using it, I only need to use the base class without paying attention to the specific implementation class. However, '_' causes the base class to be privatized and I cannot use it externally. Therefore, I hope to configure 'Session. prefix' externally to set the prefix of the base class ### Solution _No response_ ### Alternatives _No response_ ### How important is this improvement for you? -- select -- ### Feature would mainly be used with -- select --