PUT/DELETE /dashboards/{id}/permissions/{userId} (per-resource dashboard
grants, built earlier this phase) had no caller but Go tests and curl --
named as a real, disclosed gap in docs/phase-4-runbook.md. Adds a CLI
surface: sentryctl dashboards permissions list/grant/revoke, following
the existing dashboards subcommand pattern.
grant/revoke needed a new httpclient.go helper (httpMutateNoBody) since
both endpoints respond 204 No Content -- the existing helpers all expect
a JSON body to pretty-print. grant validates the role client-side
(viewer/editor only, mirroring api/dashboards.validGrantRole) before
making a request, since Admin/Owner already have tenant-wide dashboard
access and a resource-level grant can never raise someone past Editor.
Verified with real httptest.Server round trips (method, path, request
body, and error-body parsing on a 501 from a deployment with no
enterprise permission service wired in) -- the same pattern every other
sentryctl subcommand's tests already use, no fake/mock client needed
since sentryctl itself is just an HTTP client with no store of its own.
jcoffey-dev
3cf1320881