fix!: enforce unique agent names per workspace #5497
Merged
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This is only implemented in Go because writing a constraint would be difficult as the only way to check if an agent name is conflicting is by checking 3 different tables for information. Constraints don't support that, so we'd have to write a trigger. This is also how we do app name unique-per-workspace constraints because of the same problem.
I think this is good enough. Coder doesn't crash or have massively bad behavior if multiple agents share a name, it just will pick one instead of the other when doing operations by name.