Release Compass 0.3.15

[forhappy]

Summary

Release Compass 0.3.15 from the latest origin/main.

Release highlights

• Hard-cut Kotlin onto the version-1 universal evidence adapter with exact compiler-backed Java/Kotlin call resolution and Spring Kotlin universal framework evidence.
• Harden fact-neutral incremental graph updates, bounded snapshot reclamation, and deterministic record reuse.
• Allow in-scope symlinked skill destinations during Compass installation.

Validation

• cargo check --workspace --all-targets --locked
• cargo fmt --all -- --check
• cargo clippy --workspace --lib --bins --locked -- -D warnings
• cargo test --workspace --lib --bins --locked
• Compass product contract, product boundary, release scripts, and code-graph qualification
• JavaScript typecheck/tests, 82 Playwright tests, and deterministic viewer asset check

The release tag and GitHub artifacts will be published only after all required PR checks pass.