* feat: support `database`, `bucket`, and `bucket-name` as grpc header names
* chore: lint
* chore: update doc to accept `database`, `bucket`, and `bucket-name` as parameter names
* chore: update doc to only show `database` as the parameter name
* refactor: consolidate header names into a const vec and update comments on database
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Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>