I feel for you! Italian and Chinese were my two most difficult experiences.
It depends on the person what it takes to pull you out of ketosis. That seems to be determined by your sensitivity to carbs and how long you have been in ketosis.
Realize that a 1/2 cup of panna cotta may have 20 to 30 carbs depending on how it is made. Cheese if it is good quality and/or a hard cheese may have 0 carbs or for other grades I have seen as high as 7 carbs per ounce. Cold Cuts can also vary in carb count from 0 to 4carbs per slice which can be anywhere up to 2 ounces in a slice.
Here is the thing, outside of the panna cotta, having a piece or two of calamari probably wouldn't mess you up (many people don't have the control for just 2 pieces though), the cold cuts won't mess you up, and more than likely the cheese won't mess you up. It can slow you down.
All you can do is keep moving forward and figure out the best way to manage it for next time. Immediately go back to a phase 1 or at worst phase 2 day. Keep that day simple and to plan and you should be fine. Drink plenty of water to flush the added sodium you may have had from the foods yesterday.
If it is ever possible, I find it helpful to either know or choose the restaurant we eat at AND, before getting there, either review the menu or call the restaurant to confirm what they have, go over my food "intolerance" issues, and then see what they can do to help me out.
I used that technique for my birthday, a surprise to a great restaurant, and the manager actually had a special salad prepared which was waiting for me when I arrived at our reservation time. They even specially marinated the meat I ordered to avoid the added sugar and didn't pre-butter the veggies but drizzled with a bit of olive oil. I ordered, and what came to the table was "perfect"
My date and I were both comfortable and happy.
Also, when I ordered out, I learned to automatically ask certain questions.
Does this have [cheese, croutons, carrots, tomatoes, green peppers, dairy (milk/butter), grains/wheat/gluten/breading] of any kind?
From there I could make adjustments to have things on the side, grilled or sauteed (the peppers), or removed totally.
I only ran into one issue with that process and it was when a server didn't realize a rue was used to coat the chicken pieces before they were sauteed and didn't know a rue was made with flour. OH WELL!
Good luck to you on the next meal and don't stress over yesterday.