Change YdbType value String attribute to YDB PrimitiveType

[mipo256]

Currently, @YdbType annotation access value as java String, which is not a type-safe API.

In the next major release I propose to migrate String value() --> PrimitiveType value() in order to ensure type safety.

[KirillKurdyukov]

This feature depends on JDBC dependency :(

[mipo256]

I do not think so 😄

The current version accepts a string to later on create a PrimitiveType enum from that. The created PrimitiveType is then converted into java.sql.SQLType which is indeed a JDBC api.

The PrimitiveType is an enum, therefore, its instances are considered as a compile time constant and can be used as an Annotation attribute.

[mipo256]

I will provide the PR.