Feat: Display Apollo Router version on startup.

[o0Ignition0o]

This commit displays the Apollo Router version as an INFO when the router starts.

[garypen]

We are using this kind of format in the spaceport (which was inspired by the TS naming convention):

        format!("{}@{}",
            std::env!("CARGO_PKG_NAME"),
            std::env!("CARGO_PKG_VERSION")
        );

It would just become:

tracing::info!("{}@{}", std::env!("CARGO_PKG_NAME"), std::env!("CARGO_PKG_VERSION"));

[o0Ignition0o]

oh that's neat, I thought this would be an issue because our product names must start with a capital letter ?

Happy to change it if @prasek and @abernix dont mind!
Also ++ for consistency across our apps

[abernix]

I'm good with apollo-router@x.y.z, though it's worth noting that the usage in spaceport is meant to be serialized into a protobuf file and be machine readable:

router/apollo-spaceport/src/lib.rs

Line 146 in bef4fc6

header.agent_version = format!(

This user story is very different. It's, instead: As a user, I want to be able to quickly see the version I'm running at startup.

I don't think that calls for consistency in that case and I think Apollo Router vX.Y.Z would look nice for a human to read.

But again, I'm fine with apollo-router@x.y.z.

[abernix]

❤️

[abernix]

I'm good with apollo-router@x.y.z, though it's worth noting that the usage in spaceport is meant to be serialized into a protobuf file and be machine readable:

router/apollo-spaceport/src/lib.rs

Line 146 in bef4fc6

header.agent_version = format!(

This user story is very different. It's, instead: As a user, I want to be able to quickly see the version I'm running at startup.

I don't think that calls for consistency in that case and I think Apollo Router vX.Y.Z would look nice for a human to read.

But again, I'm fine with apollo-router@x.y.z.

[prasek]

But again, I'm fine with apollo-router@x.y.z.

👍