In a nutshell, the task at hand is to mark (or render) a model attribute in the typical "_form.php" view file with the 'required' red asterisk while this attribute is not marked as required in the model's rule() method.
If you're interested only in the solution, jump ahead to the 'solution' section below.
I found a standard Yii app's protected folder structure nearly perfect. With a few simple moves and a little bit change to the code, I managed to bring it to the level, which I found as fully perfect. I want to share my point of view, in case someone would like to use this structure as well.
One can control the detail of a web application in the webroot/index.php file by manipulating the values of YII_DEBUG and YII_TRACE_LEVEL, but these don't appear to be used by console applications. This is because although the base CApplication class defines a displayError() method that does consider these variable, CConsoleApplication overrides it with a function that doesn't honor them.