[GoDeskio]

REA plan item 62. This PR is stacked on #24.

• API: GET /v1/databases/{name}/keys. It pages through keys with SCAN and shows one key by type (string, list, set, hash, zset, stream) along with its TTL and size.
• Safety: read-only allow-list, a forced : prefix (other databases' keys return 403), backslashes rejected in patterns, and a cap of 100 items and 4 KB per value.
• Console: a Browse button, key search with paging, and values hidden until you press the eye toggle.
• Tests: 8 new, including a scoping test and an API route test; the management tests still pass. CI step: docs/ci/cmo-browse-test.patch.
• Not tested live: not run against a live server, and the page has not been viewed in a browser.