This commit introduces an optional `dbType` parameter to various JDBC read functions. It allows for specifying the database type directly, enhancing flexibility and control over query execution. This change ensures backward compatibility by defaulting to type inference when `dbType` is not provided.

This update introduces the ability to specify custom database types in the data schema generation process. The changes include the addition of a `dbTypeClassName` field and modifications to pass `DbType` to relevant functions. This enhances flexibility in handling various database types beyond the default configurations.

This update refactors the DataSchemaGenerator to use ServiceLoader for loading DbTypeProvider and removes hard-coded class loading. It also changes the annotation parameter from dbTypeClassName to dbTypeKClass for better type safety.