v4.2.1 — SessionStart hook path fix

Patch fixing two SessionStart hooks (check-schema-versions.sh + check-installed-nodes.sh) that resolved REPO_DIR to the plugin install dir instead of the consumer workspace. v3.7.1 fixed this for cred-freshness + workspace-migration but missed these. Explains the persistent ".env not found" warning consumers saw on every session despite having a populated .env in the repo root.

No skill changes, no manifest changes beyond the version bump.

Full changelog: https://github.com/neurawork-git/n8n-autopilot/blob/main/CHANGELOG.md#421--2026-05-20