v1.6.0

What's Changed

• fix(release): append .exe for windows-gnu targets, not just windows-msvc by @randlee in #544
• fix: allow preserved channels in release preflight retry by @randlee in #545
• fix: thread already-published-channels through release-candidate provenance gate by @randlee in #546
• fix: recover published release channel retries in release.yml by @randlee in #548
• fix: emit resolved SHA for release.yml build_ref (regression in #548) by @randlee in #549
• fix(homebrew): preserve keyed release assets in publish workflow by @randlee in #550
• sync: main -> develop (v1.5.0 release-pipeline recovery, PR #550) by @randlee in #552
• docs(changelog): file Hermes RuntimeKind + TOML array-of-table under 1.5.0 by @randlee in #540
• site: announce sc-compose v1.5.0 by @randlee in #547
• docs(phase-R): plan Beads formula composition integration by @randlee in #555
• docs: flip ADR-0021 status to Accepted by @randlee in #556
• R.1: Beads Contract and Execution Engine by @randlee in #558
• R.2: Bead CLI and JSON Protocol by @randlee in #559
• feat(beads): add Python bindings by @randlee in #560
• R.3 fast-follow: residual QA findings (non-blocking) by @randlee in #561
• Phase R: Beads Formula Composition Integration by @randlee in #562
• fix(beads): close output-write symlink/TOCTOU and hardening gaps from prod-readiness review by @randlee in #563
• fix: re-pin sc-lint bootstrap fixture to sc-compose 1.5.0 by @randlee in #554
• test: pin 5 adversarial-fuzz findings against sc-composer-beads by @randlee in #564
• fix(beads): consistent legacy JSON null rendering across nesting depth by @randlee in #565
• fix(beads): distinct render-failure messages per cause by @randlee in #568
• fix(beads): terminate orphaned descendant on output-cap breach (Unix + Windows) by @randlee in #567
• fix(beads): reject NUL/argv-illegal bytes in bead_variable values by @randlee in #569
• fix(beads): TOML-aware escaping for .formula.toml.j2 values by @randlee in #566
• Main->develop by @randlee in #553
• release: prepare 1.6.0 by @randlee in #570

Full Changelog: v1.5.0...v1.6.0