docs: correct manual testing guide against the current CLI surface

The guide had drifted well beyond the deployment-flow change:

- Commands moved under the `provider` and `connections` groups
  (`provider list`, `provider inspect`, `provider register|remove|revoke`,
  `connections inspect`, `connections set-default`). Update every invocation.
- Remove the documented `get`, `export`, `--show-secret`, and `--json`
  commands/flags — none exist. `connections inspect` is always redacted
  and there is no human-table mode; output is always JSON (`{"v": 1, ...}`).
- Add sections for `scan`, `profile`, and `daemon restart`/`logs`.
- Note admin-only operations (register/revoke) and JSON-shaped expected
  output throughout; fix the `daemon status` health block (no `mode`).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Entire-Checkpoint: b68c1ae5d66c

Author: manojbajaj95