GitHub.BranchProtection: requiredStatusChecks.checks fails with "Invalid request"

[peterje]

Declaring required status checks with checks makes GitHub reject the branch protection update with HttpError: Invalid request.

BranchProtection.ts always sends contexts: checks.contexts ?? [], and adds checks alongside it when provided. GitHub's update-branch-protection endpoint does not accept both contexts and checks in the same request, so any use of checks fails. Using contexts instead works.

yield* GitHub.BranchProtection("main", {
  owner, repository, branch: "main",
  requiredStatusChecks: {
    strict: false,
    checks: [{ context: "Verify" }, { context: "API tests" }], // → HttpError: Invalid request.
  },
});

Observed with alchemy 2.0.0-beta.80; the same code is on main (ea384f0), packages/alchemy/src/GitHub/BranchProtection.ts:433.

Suggested fix: send checks without contexts when checks is given, and contexts only otherwise.