docs: OpenAPI and API.md cover every route; drop removed endpoints; guard config writes

- openapi-extra/run.js describes tmux pane runs only: the removed
  POST /api/run/{id}/message and stream-json run_stream/run_input_ack are gone.
- 108 operations added to OpenAPI (lanes, run, settings, reports, cc-config,
  pets, ai-proxies, tool-profiles, ai-tools, snapshots, locks, ...);
  openapi.yaml regenerated.
- docs/API.md: 74 routes added, 4 endpoints that no longer exist removed.
- Role is `developer`, not `member` (CLI.md, DATABASE.md, OVERVIEW.md);
  `agenthub update` -> `update-check`; help lists `server install-system|tools`
  and `users provision`; ARCHITECTURE.md's stale paths and names fixed.
- cc-config/codex-config writes carry sameOriginGuard (an MCP server or plugin
  is code Claude runs later), with a test; `command -v` takes its name as $1.

docs/README.md

@@ -43,7 +43,7 @@ graph TB
 |----------|-------------|----------|
 | [client/README.md](../client/README.md) | React frontend architecture, components, state management | Frontend developers |
 | [server/README.md](../server/README.md) | Express backend, database, WebSocket, API | Backend developers |
-| [API.md](./API.md) | REST API endpoints (sessions, agents, events, stats, analytics, hooks, pricing, workflows, settings, import history, **cc-config**, **run**), WebSocket protocol (including `run_stream` / `run_status` / `run_input_ack` for the Run page) | Integration developers |
+| [API.md](./API.md) | REST API endpoints (sessions, agents, events, stats, analytics, hooks, pricing, workflows, settings, import history, **cc-config**, **run**), WebSocket protocol (JSON broadcast messages, plus the binary `/ws-pty/:runId` terminal stream of a lane pane) | Integration developers |
 | [SERVER-MODE.md](./SERVER-MODE.md) | Server mode: logins and roles for a dashboard shared over the web (`agenthub server setup`), reverse proxy setup | Operators |
 | [DATABASE.md](./DATABASE.md) | SQLite schema, queries, performance | Database administrators |
 | [HOOKS.md](./HOOKS.md) | Claude Code hook system integration | Hook developers |