[WIP] SEARCH-738 / SEARCH-739 (indexer): Support and search by medium MBIDs

[reosarevok]

Problem: SEARCH-738 / SEARCH-739 (indexer part)

metabrainz/musicbrainz-server#3502 adds MBIDs to mediums, so they should also be added to the relevant search indexes.

Solution

• Set id for medium in wscompat using the gid (needs to be tested to see if it needs loading explicitly or not).

Test hints

Using musicbrainz-docker and sample data dump, rebuild the 3 search indexes with:

sudo docker-compose exec indexer python -m sir reindex --entity-type release --entity-type recording

Then query the web service (in XML):

• /ws/2/recording?query=rid:52bc6f21-2c6d-48d0-be24-6ddb06a8461c
• /ws/2/release/?query=reid:6473ff12-496f-3fb8-a94a-65d565487885

(Note that XML/JSON formatting will be covered by CI tests in the associated mb-solr PR [to be linked here]).

Checklist for author

• [] Test this locally with the mb-solr PR and a new mb-rngpy test version
• Have a new release of mmd-schema
• Have a new release of mb-rngpy based on it
• Use that release instead of the test version in requirements.txt
• Test locally with that release