Governance, metadata, and hygiene release on the max578/PESTO
channel. Canon channel migration completes (DESCRIPTION URLs,
CITATION.cff, codemeta.json, inst/CITATION, _pkgdown, README,
CONTRIBUTING, API_STABILITY, pkgdown workflow). Metadata trinity
synchronised at 0.4.0; codemeta.json copyrightHolder corrected to
Max Moldovan (Person, ORCID 0000-0001-9680-8474). AAGI canon recipes
added: CODE_OF_CONDUCT.md (Contributor Covenant v2.1), SECURITY.md,
air.toml, .lintr.