meteorisgreat:ferretdb-index-fix

What it does

• Removes sparse & unique from index specs that Meteor’s accounts packages create, because FerretDB (≤ v2.2) still lacks sparse/partial index support.
• Runs every createIndexAsync sequentially to avoid Postgres 40P01 “deadlock detected”.
• Swallows only 2 benign errors (deadlock detected, code 86 IndexKeySpecsConflict).

How to use

In Meteor, run the following:

meteor add meteorisgreat:ferretdb-index-fix

List it before accounts-password in .meteor/packages if you edit that file manually.

Remove the package once FerretDB closes issue #2448 and supports sparse / partial indexes natively.