Resolves a DatabasePlatform string to its concrete SQLDialect instance.
This is the single factory for dialect resolution — all consumers should call this instead of maintaining their own switch/map.
The database platform key (e.g., 'sqlserver', 'postgresql')
The concrete SQLDialect instance for the platform
Error if the platform is not registered
Resolves a DatabasePlatform string to its concrete SQLDialect instance.
This is the single factory for dialect resolution — all consumers should call this instead of maintaining their own switch/map.