Add a production filter to the bookings() query

[zst-c]

What?

• This adds three filters to a bookings query.

  1. Based on the name of a production linked to each booking.

     • This filter is whitespace sensitive, so that a query for e.g. "A Show" would only match "A Show" and not "A" || "Show".

  2. Based on the slug of a production linked to each booking. This must match exactly.

  3. Based on the performanceId of a performance linked to each booking. This must also match exactly.

     • This ID is in base64 format, and converted to the corresponding numeric ID within the query.

• This also adds tests for the various new filters.

Why?

• This is used by the global bookings page in the admin part of the Web repo. (See this PR).

Notes

• We should consider if we want the first filter just to search the production name, or if we want it to search the slug or anything else as well.