Opel astra z16se 1.6 8v - After engine overhaul, about 2000 km candles, strange

Hello.

As in the topic of over 2k km ago, there was a renovation, namely, replacement of rings, replacement of valve seals, replacement of pushrod levers, camshaft (levers and shaft were worn, thresholds on the shaft) + seals, the problem was terrible smoking at idle and oil consumption approx. (maybe more) 750 ml per 200 km, engine mileage 220k, the foreman said that the cylinders are ok, head planning, valve seat grinding - if this is the name of this activity , flooded with 10w40 oil.

Now, after the renovation, it takes about 0.5l per 1k, measured all the time in the same place (the dipstick, as I saw in the oil pan, goes at an angle, so a slight tilt of the car on the dipstick is a big difference / distortion), for me it takes a lot, but less than before ....
I unscrewed the candles from the car and on each candle, as you can see in the pictures, there is an identical carbon deposit on one side, which may be the cause, I will add a car driven on LPG - I do not want to suggest anything yet, I will ask for opinions, help, thanks.

He takes your oil and burns you.

You can see from the candles that it is burning oil. If he's smoking blue, you already know what's up

Such one-sided soot, carbon deposit, from burning oil through the pusher seat or rings (they do not collect oil from the cylinder) if such a diagnosis was made?
Now in the morning and afternoon, when I stand in a traffic jam, it is as if the flying steam disappears quickly in the air.
I stood at the gas station for a long time, I turned off the engine, after refueling, i.e. about 4 minutes after firing, a blue smoke appeared.

I would like to add that the dark color on the candle is so shiny, it is not wet but burnt.