PostgreSQL storage: guard against contains queries on non data fields.

[dim]

PostgreSQL doesn't support @> operator usage on non JSONB fields, e.g.:

http GET http://localhost:9080/v1/buckets?contains_id=x  --auth="xxx"
HTTP/1.1 503 Service Unavailable

Logs:

Message: ProgrammingError("(psycopg2.errors.UndefinedFunction) operator does not exist: text @> text[]\nLINE 7: ...N ('864c05df-81d1-c946-9900-de717c6f882c') AND id @> ARRAY['...\n                                                             ^\nHINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.\n")

[leplatrem]

Nice catch! Thanks for reporting!