Heap Inspection - Password Stored in String

https://github.com/OWASP/SecurityShepherd/blob/653843e89f9456caf6b13d1fc68d1b02c3f81260/src/main/java/dbProcs/Database.java#L78

We should change this so that it's stored in a char[]

Example usage;

class StoreSensitiveData{
    private char[] sensitiveData;

    //use the data
    public void store(){
        try{...}
        catch(IOException e){...}
        finally{wipe()}
    }

    //wipe data
    public void wipe() {
        if (sensitiveData != null) {
            Arrays.fill(sensitiveData, '*');
        };
        sensitiveData = null;
    }
}

Open src/main/java/dbProcs/Database.java at line 78 and inspect how the password is stored and used. Change the storage to follow the issue's char[] example, ensuring the existing database flow still works and the sensitive value can be wiped afterward; verify the affected Java code builds or its relevant tests pass.