Update Composite ML-DSA OIDs to final IANA-assigned values

[Copilot]

Update Composite ML-DSA OIDs to final IANA-assigned values

• You've read the Contributor Guide and Code of Conduct.
• You've included unit or integration tests for your change, where applicable.
• You've included inline docs for your change, where applicable.
• There's an open issue for the PR that you are making. If you'd like to propose a new feature or change, please open an issue to discuss the change or find an existing issue.

Description

The Composite ML-DSA spec (draft-ietf-lamps-pq-composite-sigs-13) finalized its algorithm OIDs under the IANA arc. The .NET runtime was updated in dotnet/runtime#120077. This PR updates the 18 hardcoded Composite ML-DSA OID constants in CertificateConfigLoader.cs to match.

• CertificateConfigLoader.cs: Replace all composite ML-DSA OID string constants from the old Entrust draft arc (2.16.840.1.114027.80.9.1.{0–17}) to the final IANA-assigned arc (1.3.6.1.5.5.7.6.{37–54}).

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• datatracker.ietf.org
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• https://api.github.com/repos/dotnet/runtime/pulls/120077
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• www.rfc-editor.org
  • Triggering command: /usr/bin/curl curl -s REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[dotnet-policy-service]

Hey @dotnet/aspnet-build, looks like this PR is something you want to take a look at.

[Copilot]

Pull request overview

Updates Kestrel’s certificate private-key loading logic to recognize Composite ML-DSA certificates using the finalized IANA-assigned algorithm OIDs, keeping Kestrel aligned with the updated .NET runtime OID set.

Changes:

• Replaces 18 hardcoded Composite ML-DSA OID constants from the old Entrust draft arc to the final IANA-assigned arc (1.3.6.1.5.5.7.6.37–.54).
• Keeps the existing CompositeMLDsa import/copy path unchanged, only updating the identifiers it matches on.