Use Postgres.js internal transform options

[Victor Ejike Nwosu]

Postgres.js provides a way to normalize database data from snake_case to camelCase, and also convert any undefined values to null

docs here: https://github.com/porsager/postgres#data-transformation

• We should delete camelcase-keys and use Postgres.js internal camelcase options
• Use undefined: null to set all incoming undefined values to null instead (which is a big source of confusion for students, see porsager/postgres#380 )

Code example

    globalThis.postgresSqlClient = postgres({
      transform: {
        ...postgres.toCamel,
        undefined: null,
      },
    });

[Karl Horky]

Sounds like a good idea! Let's do it for the next example.