Documents the cookie-path worker: endpoint and headers mirrored from
the mm-diigo original, DIIGO_COOKIE secret setup (local .dev.vars vs
wrangler secret put), the inert-GET / POST-only-submit behavior, and
the manual test result (200, total 1674, 2026-10-06) with pointers to
the checklist and capsite notes.
Generated-by: opencode (GLM)
