docs(reflow): soften feedback references; drop internal service details
Remove links to the internal feedback service repo and the service's
implementation details (SQLite, Metabase) from user-facing pages.
Reframe as "reviewed by the Equalify team". WP plugin settings docs
still name the Feedback Service URL / API Key fields because admins
need to configure them — but no longer link the repo.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>