Phase 29y.1 cleanup: Eliminate duplicate ny_release_strong implementation. Changes: - Remove duplicate ny_release_strong from lib.rs (11 lines) - Consolidate into ffi/lifecycle.rs (rename shim → legacy name) - Maintain backward compatibility with existing LLVM lowering Verification: - quick: 154/154 PASS - integration phase29y: 2/2 PASS 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>