feat(discord-control): add private-channel and member-list admin API

README.md

@@ -19,6 +19,7 @@ The no-reply provider returns `NO_REPLY` for any input.
 
 - `plugin/` — OpenClaw plugin (before_model_resolve hook)
 - `no-reply-api/` — OpenAI-compatible minimal API that always returns `NO_REPLY`
+- `discord-control-api/` — Discord 管理扩展 API（私密频道 + 成员列表）
 - `docs/` — rollout, integration, run-mode notes
 - `scripts/` — smoke/dev/helper checks
 - `Makefile` — common dev commands (`make check`, `make check-rules`, `make test-api`, `make up`)
@@ -39,6 +40,8 @@ node scripts/render-openclaw-config.mjs
 
 See `docs/RUN_MODES.md` for Docker mode.
 
+Discord 扩展能力见：`docs/DISCORD_CONTROL.md`。
+
 ---
 
 ## Development plan (incremental commits)