test(ci): align publish workflow contract

docs: regenerate openapi spec

bump version to v0.7.0

docs: move security and release checklist into docs and update cross-…

…links

bump version to v0.6.0 (and apply some pre-commit formatting collateral)

feat(slack): finalize secure Events API integration with no-skip R124…

…/R125 gates and docs/roadmap sync

fix(ci-tests): install cryptography in CI/pre-push, add requirements.…

…txt baseline, and harden no-crypto fallback for registry signature + secret store tests

feat(wave-c): finalize operator guidance/context actions/parameter-la…

…b compare and sync README with Wave A-B-C hardening

feat(connector): complete with Kakao output hardening, WeChat AES par…

…ity, and sidecar worker endpoint E2E alignment