…nUpdate the Go toolchain to 1.23.4 and refresh all module dependencies\nto their latest compatible versions. This includes major updates to\nethkit, cobra, and other core libraries to ensure compatibility with\nthe latest Go version and to incorporate security fixes and new features.\n\nAlso add a new dependency on hashicorp/golang-lru/v2 for future caching\nfunctionality.\n\nThe update also includes improvements to the metadata service:\n- Add context timeouts to prevent hanging operations\n- Handle context cancellation gracefully during shutdown\n- Improve error handling and logging for sync status updates\n\nThese changes ensure the application remains secure, stable, and compatible\nwith the latest ecosystem changes while improving reliability of the\nmetadata service operations.

refactor: replace deprecated grpc.Dial with grpc.NewClient
style: add missing nolint:errcheck comments on type assertions
refactor: extract string literals into const keys to avoid typos
chore: add empty lines for readability in metadata service
test: replace hard-coded "test-id" with const testID