fusion/.changeset/FN-4912-secrets-env-materialization.md

@runfusion/fusion

@runfusion/fusion
minor

Implement .env secrets materialization pipeline: honor secretsEnv project settings (enabled/filename/overwritePolicy/keyPrefix/requireGitignored), gate writes behind git check-ignore, emit secret:env-write / secret:env-write-skipped / secret:env-cleanup / secret:env-cleanup-skipped run-audit events, and clean up fingerprint-matching .env files on worktree teardown.