feat(memory): add exec approval config lessons, daily notes, ACP decisions

- shared/long-term/lessons: OpenClaw exec 批准授权系统完整配置经验
- daily/2026-03-16: CLI安装、exec配置、待办记录
- daily/2026-03-15: 之前未提交的日志
- shared/long-term/decisions/acp-agents-integration.md
- agents/openclaw-main: claude-switch/mcp 相关记录

daily/2026-03-15.md

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+# 2026-03-15 - Daily Log
+
+## Gateway Issue Resolved (04:28 - 05:29)
+
+**Problem:** Gateway was configured with `bind: tailnet` but CLI was trying to connect via `ws://127.0.0.1:18789`, causing connection failures.
+
+**Resolution:** Changed gateway config from `"bind": "tailnet"` to `"bind": "loopback"` and restarted the gateway service.
+
+**Status:** Gateway is now healthy and operational.
+
+## Node Status
+
+- **mac-6 (Executor Node):** Disconnected - no nodes registered with gateway
+- **mac-7 (Browser Node):** Disconnected - no nodes registered with gateway  
+- **mac-8:** Retired (expected)
+
+**Note:** Nodes need to be re-paired via `openclaw node run/install` on each node if cluster execution is required.
+
+## Heartbeat Checks
+
+- 04:28 - Gateway failed, nodes 0/3
+- 04:59 - Gateway failed, nodes 0/3
+- 05:29 - Gateway fixed, nodes 0/3
+- 05:59 - Gateway OK, nodes 0/3
+- 06:29 - Gateway OK, nodes 0/3
+- 07:29 - Gateway OK, nodes 0/3
+- 08:29 - Gateway OK, nodes 0/3