Change: Adds latestDeployment for Environment

[CGoodwin90]

General Checklist

• Affected Issues have been mentioned in the Closing issues section
• Documentation has been written/updated
• PR title is ready for inclusion in changelog

Adds minimal field resolver latestDeployment to Environment.

Required for uselagoon/lagoon-beta-ui#148

[github-actions]

Overview

Image reference	testlagoon/api:main	lagoon/api:ci-latest
- digest	97b436889d7c	d98d826760b5
- tag	main	ci-latest
- vulnerabilities
- platform	linux/amd64	linux/amd64
- size	151 MB	182 MB (+31 MB)
- packages	1579	1579
Base Image	node:22-alpine also known as: • 22-alpine3.23 • 22.22-alpine • 22.22-alpine3.23 • jod-alpine • jod-alpine3.23	node:22-alpine also known as: • 22-alpine3.23 • 22.22-alpine • 22.22-alpine3.23 • jod-alpine • jod-alpine3.23
- vulnerabilities

[rocketeerbkw]

This PR adds a new field that can be used like:

query {
  environmentByName(project: 1, name: "main") {
    latestDeployment {
      name
    }
  }
}

But this is functionally equivalent to the existing query that can be used:

query {
  environmentByName(project: 1, name: "main") {
    deployments(limit: 1) {
      name
    }
  }
}

They both return the same data, and they even both run the same sql query, so I don't see the benefit of extended the API in this way.

If latestDeployment needed to return a different type than Deployment or there was some need for special performance handling, I'd be happy to see that get in.

[CGoodwin90]

This PR adds a new field that can be used like:

query {
  environmentByName(project: 1, name: "main") {
    latestDeployment {
      name
    }
  }
}

But this is functionally equivalent to the existing query that can be used:

query {
  environmentByName(project: 1, name: "main") {
    deployments(limit: 1) {
      name
    }
  }
}

They both return the same data, and they even both run the same sql query, so I don't see the benefit of extended the API in this way.

If latestDeployment needed to return a different type than Deployment or there was some need for special performance handling, I'd be happy to see that get in.

Perfect! Didn't realize using limit this way returned the latest, closing this off now.