Optimize Container Builds and Publish Runtime Variants

[yuanzui-cf]

Objective

Reduce container build time and publish supported Debian, Debian Slim, and Alpine runtime images for versioned releases.

Scope

• Preserve GitHub Actions BuildKit caching while separating stable Rust dependency layers from frequently changing application sources.
• Build fully static musl Rust binaries that can be shared by all runtime variants.
• Publish version, branch, and commit tags with matching default, -slim, and -alpine variants.
• Use Debian Bookworm, Debian Bookworm Slim, and Alpine 3.22 runtime bases.
• Document image selection and local build commands.
• Define repository-wide English content standards for GitHub Issues and pull requests.

Acceptance Criteria

• Rust dependency compilation is reusable when application source files change without dependency changes.
• A version tag publishes <version>, <version>-slim, and <version>-alpine.
• Branch and commit tags use the same runtime suffix convention.
• Each image runs both Grass Worker binaries, provides Git 2.49 or newer, and uses the expected operating-system base.
• The static musl binaries and final image sizes are measured during validation.
• just quality passes.

Constraints

• GitHub's default branch remains main.
• No existing zero-use or semantically overlapping labels are removed.
• Only formatting-duplicate area labels are migrated and deleted.