fix(backend-api): Update GraphQL schema

[theduke]

The GraphQL API was updated, making some previously mandatory fields optional.

This caused parsing issues and deployment failures for remote builds.

Mitigations have been implemented upstream, but we need to update the
schema to align the definitions.

[Copilot]

Pull request overview

This PR updates the GraphQL schema and corresponding Rust types to align with upstream API changes, addressing parsing issues and deployment failures for remote builds. The changes make previously mandatory fields optional to accommodate backend API evolution.

Key changes:

• Renamed StatusEnum::Failure to StatusEnum::Failed to match the GraphQL schema update
• Made build_cmd, install_cmd, and start_cmd optional in BuildConfig and related types
• Added extensive new types and fields to the GraphQL schema for rollouts, GitHub integrations, and billing improvements

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
lib/backend-api/src/types.rs	Updated Rust types: renamed StatusEnum::Failure to Failed, made BuildConfig command fields optional, and added start_cmd field
lib/backend-api/schema.graphql	Comprehensive GraphQL schema update: renamed FAILURE to FAILED, made build command fields nullable, added new types for rollouts/GitHub integrations, deprecated old fields, and enhanced billing types

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[syrusakbary]

This PR showcases one of my biggest concerns on the current architecture of GraphQL in the client. We are fetching data that we DON'T EVEN USE anywhere.

Basically so cynic works well, we lay out all the types regardless of us using them or not, or the endpoint needed the data or not.
This basically makes breaking changes impossible, when they should be possible if the data is not used.

[theduke]

You can never break public GraphQL APIs, or public APIs in general, anyway, because you don't know who is using it.