🥇 Thanks FetchGoat for upgrading to Gold Sponsor

<!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Documentation** * Reorganized and expanded the sponsor section in README with updated call-to-action messaging. * **Chores** * Updated sponsor tier assignments; FetchGoat sponsor promoted to gold tier. * Added container image metadata. _{✏️ Tip: You can customize this high-level summary in your review settings.} <!-- end of auto-generated comment: release notes by coderabbit.ai -->