Rename DatasourceId path parameter

[papagian]

We hope that this would be less confusing for grafana users.

Its value should be grafana for requests to be handled by grafana and the numeric datasource id for requests to be forwarded to a lotex datasource.

The chosen name Recipient is discussable.

Update
I have added a 0ed8a62 which is also required for grafana/grafana#32208.

[domasx2]

Recipient makes me think of emails :D

Still gonna be int, === datasource.id, right? or will it take datasource.name as well?

[owen-d]

Recipient sounds good, but we'll need to ensure a datasource name won't conflict with this reserved "grafana"key.

[papagian]

Recipient makes me think of emails :D

Still gonna be int, === datasource.id, right? or will it take datasource.name as well?

In the suggested implementation if it equals the reserved "grafana" key is handled by the grafana otherwise is expected to be convertible to integer and that this number corresponds to a lotex datasource id.
Hence, identifying the datasource by the name is not supported. It's feasible though to support it but it would complicate things a bit
as @owen-d mentioned if the datasource name conflicts with the reserved key. Therefore, I would suggest keeping it as is unless it's absolutely necessary.

[domasx2]

Recipient makes me think of emails :D
Still gonna be int, === datasource.id, right? or will it take datasource.name as well?

In the suggested implementation if it equals the reserved "grafana" key is handled by the grafana otherwise is expected to be convertible to integer and that this number corresponds to a lotex datasource id.
Hence, identifying the datasource by the name is not supported. It's feasible though to support it but it would complicate things a bit
as @owen-d mentioned if the datasource name conflicts with the reserved key. Therefore, I would suggest keeping it as is unless it's absolutely necessary.

That's cool, just wanted to be sure. Thanks!

[owen-d]

Why did you change this to be iota + 1?
edit: to not conflict with the zero value -- that's fine.