fix: reintroduce composite index for project stats query (see #911)

chore: drop remaining leftovers from former mssql support

test: fix login and webauthn tests

chore: minor code style

chore: upgrade dependencies

test: fix tests

Merge remote-tracking branch 'origin/master'

# Conflicts:
#	coverage/coverage.out

chore: improved oidc error logging

Merge branch 'fork/k2on/theming'

chore: cockroach deprecation warning

feat: current online users count (resolve #798)