Unrelevant for this note. Also, data should be already present.
'building passage' refers to a corridor/hallway/tunnel through/under a building/part from the front to the back of the building, sometimes on the side of a building, but only if there is a wall on both sides. There are numerous of these in the city. Some gated, some private, some foot/cycle/service way.
https://wiki.openstreetmap.org/wiki/Tag:tunnel%3Dbuilding_passage

The image previously posted looks at the front of the Grapevine building. The possible building passage is the third / most right 'window'/arch. On the image it is obscured.
There is a better image now. This one looks straight at it.
https://www.mapillary.com/app/?pKey=374415582129486&focus=photo
Based on this image, it looks to be locked, at least outside of opening hours. A bit too dark to say if it goes/went anywhere but it seems to be private 'garage' to store bins etc.

I see now bicycle parking is private but there is slight chance it is for customers.