fix: update refresh spaces counters script

[ChaituVR]

Related to #406

Context: DIscussed on discord

[wa0x6e]

The new approach was to avoid running one query per space, since it's the SELECT part that was slow.

Doing a SELECT FROM leaderboard for a single space was just a little faster than doing for thousands of space.

Approach will be:

• Send a single SELECT GROUP BY space to select all vote_count for a lot of space at once
• UPDATE space with the results from above query

Since the first query (SELECT) may be slow for big spaces, we can do 2 batches, one for verified spaces, and another one for non-verified spaces.

The SELECT query will look like

select SUM(leaderboard.vote_count), space from leaderboard JOIN spaces ON spaces.id = space   where spaces.verified = 1 GROUP by space 

[wa0x6e]

tAck