v1.20260321.1

What's Changed

• Fetch rustfmt from static.rust-lang.org by @erikcorry in https://github.com/cloudflare/workerd/pull/6368
• Mark python_external_sdk not experimental and give it an enable date by @hoodmane in https://github.com/cloudflare/workerd/pull/6351
• Fix memory tracking for tail attributes tag by @Caio-Nogueira in https://github.com/cloudflare/workerd/pull/6372
• Revert "Implement containers snapshot API (#6337)" by @gpanders in https://github.com/cloudflare/workerd/pull/6374
• containers: add custom labels support to container start options by @martinezjandrew in https://github.com/cloudflare/workerd/pull/6352
• add gc support to Rust owned objects by @anonrig in https://github.com/cloudflare/workerd/pull/6272

New Contributors

• @martinezjandrew made their first contribution in https://github.com/cloudflare/workerd/pull/6352

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20260320.1...v1.20260321.1