Replace Apollo GraphQL packages with @apollo/server

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
apollo-server (source) → @apollo/server	dependencies	replacement	^3.4.1 → ^4.0.0

This is a special PR that replaces apollo-server with the community suggested minimal stable replacement version.

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Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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This PR was generated by Mend Renovate. View the repository job log.

[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: apollo-server/v3/custom-directives/upper-case-directive/package-lock.json

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: upper-case-directive@1.0.0
npm ERR! Found: graphql@15.10.2
npm ERR! node_modules/graphql
npm ERR!   graphql@"^15.5.1" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer graphql@"^16.6.0" from @apollo/server@4.13.0
npm ERR! node_modules/@apollo/server
npm ERR!   @apollo/server@"^4.0.0" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR! 
npm ERR! See /runner/cache/others/npm/eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     /runner/cache/others/npm/_logs/2026-06-01T17_10_03_874Z-debug-0.log