Spine v3.54.0

What's Changed

🔧 Maintenance

• chore(deps): bump the production-minor-patch group across 1 directory with 8 updates by @dependabot[bot] in #510

Other changes

• Add Rust comprehension (Part A) by @ssmith-synaptixs in #509
• Add Cargo-aware Rust codegen and validation gates by @ssmith-synaptixs in #511
• fix(rust): use maintained Orchard grammar for pinned source by @ssmith-synaptixs in #512
• docs(rust): sign off core support after upstream lint merge by @ssmith-synaptixs in #513
• feat(sdlc): required-behavior gates (SSPN-116) by @ssmith-synaptixs in #514
• Release 3.54.0: required-behavior gates + Core Rust support by @ssmith-synaptixs in #515

Full Changelog: v3.53.0...v3.54.0