Based on what you have stated, I don't see anything untoward. Now, if you can find some proof that she intended to commit some nefarious act by entering your property, that opinion can change. However, nothing you have written indicates anything but "routine". And, since I have been involved in criminal cases that began with scenarios just as you describe - and they withstood all challenges - I think it is safe to say that at least in the liberal state of CA such actions tend to be lawful.

If you feel there was some for of Constitutional violation here, you are certainly free to spend many thousands of dollars for ... I'm not sure what ...but, you can do so.

Ultimately, the legal test would be if the entry was "objectively reasonable" based upon the officer's observations and the facts, an evaluation we cannot make in its entirety since we do not know what the officer had observed or believed. Nothing presented in your narrative negates an exigency to make entry, but neither can we entirely justify it based upon what you observed. And, since there is no real legal proceeding to be had here, absent an expensive law suit for no discernible end, the only realistic recourse is a complaint and, perhaps, working to change state law or local agency policy and practice. While these actions might well be cathartic, I suspect that you may well be frustrated in any and all of those attempts.