chore(tests): fix test speed

[e11sy]

check out tests workflow (~1m) ( ͡~ ͜ʖ ͡°)

Changes

Archiver

• use cursor based db fetch to avoid all projects storing in memory
• use projection to retrieve only fields that are needed
• axios (notifications) could return nothing env hook configured poorly — worker should not fail in this case

Tests

• do not await SECONDARY mongo node initialisation (since we don't have one)
• exit node.js process after tests are done to avoid open handles and infinite CI run (exit only in CI so we could debug open handles locally whenever we want)