- Route HTTP helpers (getJSON/formRequest/deleteReq/postJSON/putJSON/
multipart upload), Query and AuthenticateContext/ensureToken through the
deterministic 429/502/503/504 retry (retryRaw), so the integration suite
no longer fails on the shared openresty rate limit under parallel runs.
- Fix stale cmd/office/fetch integration test: loader.TaskFields was
replaced by loader.DetailForm (broke go vet -tags=integration).
- Add unit tests for Transient/DoRetry.