chore(deps): bump go-github v87 → v89 and resolve breaking changes

[tommaso-moro]

Summary

Bumps google/go-github from v87 to v89 across the module and resolves the resulting breaking changes.

Why

go-github v89 adds first-class REST methods for issue dependencies. This PR is the mechanical dependency bump that unblocks that work; the feature itself lands in a stacked follow-up PR (#2839). Splitting keeps the ~60-file mechanical import churn separate from the substantive feature diff.

What changed

• Rewrite all import paths go-github/v87 → go-github/v89.
• gists.go: Gists.Create now takes CreateGistRequest by value, and Gists.Edit is renamed to Gists.Update taking UpdateGistRequest.
• gists.go: while migrating update_gist to UpdateGistRequest, fix a pre-existing bug surfaced in review — omitting description sent "description": "" and wiped the gist's existing description. Description is now only set when the caller provides it; an explicit empty string still clears it. Added a test asserting the PATCH body omits description when not supplied.
• repositories_test.go: adapt to RepositoryRelease fields that became value types in v89 (ID, TagName, Draft).
• Regenerate third-party license files for the new module path.

MCP impact

• Tool schema or behavior changed
  • update_gist no longer overwrites an existing gist description with an empty string when description is omitted. No schema changes; all other tools are unaffected by the bump.

Prompts tested (tool changes only)

• "Update gist <id>: change file x.txt to …" (without a description) → the gist's existing description is preserved.
• "Update gist <id>: set the description to …" → description is updated.

Security / limits

• No security or limits impact

Tool renaming

• I am not renaming tools as part of this PR

Lint & tests

• Linted locally with ./script/lint
• Tested locally with ./script/test

Docs

• Not needed

[Copilot]

Pull request overview

This PR updates the module dependency on github.com/google/go-github from v87 to v89 and applies the required mechanical code/test updates across the server to keep the GitHub MCP tools compiling and behaving consistently, along with regenerating third-party license attributions.

Changes:

• Bump github.com/google/go-github/v87 → github.com/google/go-github/v89 and rewrite imports across the codebase.
• Update gist create/update code paths for go-github v89 API changes (CreateGistRequest, UpdateGistRequest, Gists.Update).
• Adjust repository release-related tests for go-github v89 struct field type changes and refresh third-party license outputs.

Show a summary per file

File	Description
third-party/github.com/google/go-github/v89/github/LICENSE	Add BSD-3-Clause license text for the new go-github/v89 third-party path.
third-party-licenses.windows.md	Regenerate dependency list to reference go-github/v89.
third-party-licenses.linux.md	Regenerate dependency list to reference go-github/v89.
third-party-licenses.darwin.md	Regenerate dependency list to reference go-github/v89.
pkg/raw/raw.go	Update go-github import path to v89.
pkg/raw/raw_test.go	Update go-github import path to v89 in tests.
pkg/lockdown/lockdown.go	Update go-github import path to v89.
pkg/lockdown/lockdown_test.go	Update go-github import path to v89 in tests.
pkg/github/ui_tools.go	Update go-github import path to v89.
pkg/github/ui_tools_test.go	Update go-github import path to v89 in tests.
pkg/github/tools.go	Update go-github import path to v89.
pkg/github/server_test.go	Update go-github import path to v89 in tests.
pkg/github/security_advisories.go	Update go-github import path to v89.
pkg/github/security_advisories_test.go	Update go-github import path to v89 in tests.
pkg/github/secret_scanning.go	Update go-github import path to v89.
pkg/github/secret_scanning_test.go	Update go-github import path to v89 in tests.
pkg/github/search.go	Update go-github import path to v89.
pkg/github/search_utils.go	Update go-github import path to v89.
pkg/github/search_test.go	Update go-github import path to v89 in tests.
pkg/github/repository_resource.go	Update go-github import path to v89.
pkg/github/repository_resource_completions.go	Update go-github import path to v89.
pkg/github/repository_resource_completions_test.go	Update go-github import path to v89 in tests.
pkg/github/repositories.go	Update go-github import path to v89.
pkg/github/repositories_test.go	Update release test fixtures/assertions for v89 RepositoryRelease field type changes.
pkg/github/repositories_helper.go	Update go-github import path to v89.
pkg/github/pullrequests.go	Update go-github import path to v89.
pkg/github/pullrequests_test.go	Update go-github import path to v89 in tests.
pkg/github/pullrequests_granular.go	Update go-github import path to v89.
pkg/github/projects.go	Update go-github import path to v89.
pkg/github/params.go	Update go-github import path to v89.
pkg/github/params_test.go	Update go-github import path to v89 in tests.
pkg/github/notifications.go	Update go-github import path to v89.
pkg/github/notifications_test.go	Update go-github import path to v89 in tests.
pkg/github/minimal_types.go	Update go-github import path to v89.
pkg/github/issues.go	Update go-github import path to v89.
pkg/github/issues_test.go	Update go-github import path to v89 in tests.
pkg/github/issues_granular.go	Update go-github import path to v89.
pkg/github/issues_delete_test.go	Update go-github import path to v89 in tests.
pkg/github/ifc_labels.go	Update go-github import path to v89.
pkg/github/helper_test.go	Update go-github import path to v89 in tests.
pkg/github/granular_tools_test.go	Update go-github import path to v89 in tests.
pkg/github/git.go	Update go-github import path to v89.
pkg/github/git_test.go	Update go-github import path to v89 in tests.
pkg/github/gists.go	Adapt gist create/update tool implementation for go-github v89 request types and method rename (Edit → Update).
pkg/github/gists_test.go	Update go-github import path to v89 in tests.
pkg/github/discussions.go	Update go-github import path to v89.
pkg/github/discussions_test.go	Update go-github import path to v89 in tests.
pkg/github/dependencies.go	Update go-github import path to v89.
pkg/github/dependabot.go	Update go-github import path to v89.
pkg/github/dependabot_test.go	Update go-github import path to v89 in tests.
pkg/github/copilot.go	Update go-github import path to v89.
pkg/github/copilot_test.go	Update go-github import path to v89 in tests.
pkg/github/context_tools_test.go	Update go-github import path to v89 in tests.
pkg/github/code_scanning.go	Update go-github import path to v89.
pkg/github/code_scanning_test.go	Update go-github import path to v89 in tests.
pkg/github/code_quality_test.go	Update go-github import path to v89 in tests.
pkg/github/actions.go	Update go-github import path to v89.
pkg/github/actions_test.go	Update go-github import path to v89 in tests.
pkg/errors/error.go	Update go-github import path to v89.
pkg/errors/error_test.go	Update go-github import path to v89 in tests.
internal/ghmcp/server.go	Update go-github import path to v89.
go.mod	Bump github.com/google/go-github/v87 → github.com/google/go-github/v89.
go.sum	Update module checksums for go-github/v89.
e2e/e2e_test.go	Update go-github import path to v89 in e2e tests.

Review details

• Files reviewed: 62/64 changed files
• Comments generated: 1
• Review effort level: Low