Add Kin registry release automation

[troyjr4103]

Summary

• Add Kin registry release/dependency-wave automation using firelock-ai/kin-actions@v0.1.1
• Require release-relevant Cargo source changes to move the package version before merge/publish
• Publish registry packages idempotently, verify checksum/fresh consumer install, then dispatch downstream dependency-wave PRs
• Use scoped workflow secrets instead of secrets: inherit

Verification

• Parsed all changed workflow YAML with Ruby YAML.load_file
• Ran bash -n for shared shell scripts and python3 -m py_compile for shared Python scripts
• Ran git diff --check for each repo branch
• Verified commits include DCO Signed-off-by
• Fixed and tagged kin-actions@v0.1.1 after the first PR run exposed empty registry-build-command bash handling