v2.2.0

Minor release: gh mutating-verb tiering so collaboration commands stop prod-classifying, plus target-precedence and gcloud read-only fixes.

• feat(gh): tier mutating verbs so collaboration metadata never prod-classifies by @karlkfi in #23
• fix: let config nonprod outrank the built-in prod heuristic by @karlkfi in #22
• fix(gcloud): classify logging read/tail as read-only by @karlkfi in #20
• docs: document that third-party marketplaces don't auto-update by @karlkfi in #21

Housekeeping: backlog format migration (#15) and a test repair (#24).

Full Changelog: v2.1.0...v2.2.0