resolve
Creates a new instance of T where any field annotated with @Env is replaced by the corresponding environment variable value, if set.
The method walks the primary constructor parameters of klass, reads the current property value from instance, checks for an @Env annotation, and queries System.getenv. For nested data class parameters the method recurses.
If no environment variable overrides any field, the original instance is returned (identity equality, no copy).
Return
A new instance with overridden fields, or the same instance if nothing changed.
Parameters
T
The data class type.
instance
The already-deserialized data class instance.
Throws
If an environment variable value cannot be converted to the target numeric type (e.g. "abc" for an Int field).