Dapper.AOT

[latop2604]

Fix https://github.com/hangfire-postgres/Hangfire.PostgreSql/issues/416

Also:

• merge some .Query().SingleOrDefault() into .QuerySingleOrDefault() as dapper throw the exact same exceptions as System.Linq.Enumerable.
• Replace some .ToList() by .AsList().
• Replace tuple-type by struct record as suggested in https://aot.dapperlib.dev/rules/DAP013
• Convert JsonParameter to a static class. And add ::jsonb in sql script when needed.