DeprecatedHandler does not process deprecated constructors

[Manas-Dikshit]

Issue: Constructors Can Be Deprecated but Are Not Processed

The code currently only processes methods (Symbol.MethodSymbol) but does not check for constructors.
In Java, constructors can also be marked as @deprecated, and those should also log a warning when used.
This means any deprecated constructor is ignored by this processor, leading to incomplete tracking of deprecated usages.

To handle deprecated constructors:

Modify the process method to check if the element is a constructor (MethodSymbol with the same name as the class).
Ensure that AST transformation also works for constructors.