Include user metadata in the first insert for objects

[anmolsood21]

In order to be able to use passed in user metadata for INSERT RLS policies, the user metadata should be included in the first insert request. Currently, the first insert request doesn't have any user metadata set.

See https://discord.com/channels/839993398554656828/1338777324845404262/1338777324845404262 for more context

[GaryAustin1]

This has come up before with at least 1 or 2 users.