Sound like a plan, as long as they are (partially) OSM-based ;)

goes without saying >_> (there may be some leeway on how much of it should be required to be OSM, yes)

What do you expect from the moderation team?

Not much, be chill and intervene where necessary.

What do you expect from !openstreetmap?

A middle ground between the community forum and twitter, I guess. Leave binding discussions, to the wiki and mailing lists (though if we want to share arguments here, nothings speaks against it). Any niche that allows for occasional deep talk next to showcases.

What should this place look like in about one year time?

A fair share of projects, while hopefully not the only type of content (maybe showoff threads become a necessity there)
Similarly I think projects with the data, such as renderings should have a place here, within reason. Both would probably profit from a flair system, but thats more a task for lemmy-dev than osm-lemmy-mods.
Questions and a culture that answers them in a respectful manner.
Discussion of OSM related news, such as WeeklyOSM.

Do you have any questions for us?

Long time redditor, first time lemmyng: coming from feddit, is it unusual that my abonnement is still shown as pending? Posts do appear in my feddit-feed.

addr:street and addr:housenumber to every object that reasonably has a unit number (so no sheds) for starters. There are a few possible configurations where you could reasonably interpolate unit numbers - eg. situated in a line, or side by side around a turning point - as long as you definitely know at least two. I don’t think anyone would hunt you down for interpolating precise numbers in reasonable to obvious cases, but if you want to be sure, there is addr:interpolation (see also https://wiki.openstreetmap.org/wiki/Key:addr:*#Tags_for_interpolation_ways)

If you really have no clue, or reason to believe that the numbering are not regular, I’d leave a note on the site - or add a fixme tag - or both.

I would indeed add addr:housenumber= to each unit, there is also addr:unit= which I would prefer over constructions like “addr:housnumber=123/4”. Drawing a polygon around the lot for the housenumber sounds usable, for which I would use the residential that should already be there but, preferred method for that (afaik) is a singular address node.

There is probably a section in the wiki that describes, or at least proposes, a setup for precisely this use case.