docs: add v0.5.0 changelog entry

docs: add v0.4.1 changelog entry

docs: add SKILL.md for ANCC compliance

fix: use 0o600 octal literal style for CI lint

fix: resolve CI lint errors in query.go

docs: sync version references and archive stale docs for v0.3.1

docs: update changelog and version for v0.3.0

docs: sync project docs with current standards

ci: fix release workflow YAML heredoc breaking parser

feat: add kubenow.dev/last-apply annotation to SSA patch