fizzy@e9c30a0

What's Changed

• Bump concurrent-ruby from 1.3.6 to 1.3.7 by @dependabot[bot] in #2948
• Bump crass for multiple security fixes by @rosa in #2950
• Bump msgpack to address CVE-2026-54522 by @rosa in #2953
• Add SJC staging nodes. by @Ladybiss in #2952
• Serialize card numbering with a per-account row lock by @rosa in #2954

Full Changelog: https://github.com/basecamp/fizzy/compare/fizzy@de2be80...fizzy@e9c30a0