Made auth better

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I didn’t think putting the password as a argument in the URL itself was a good implementation, so I took the liberty to beef things up a bit more.
Now:

• Separate master key
• Separate read-only key
• Keys submitted in the body of post requests

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Additionally, I found a bug with removing rows. It didn’t cascade down leading to holes in indexing so I fixed the indexing part of the script.

TODO:
Tbh, this is almost complete imo, but if I did have to do some more work, then:

• Implement RLS
• Implement indexing/cache (optional ultra pro max)