vault: align ECC docs with current repo and add orchestration manual

Updated ECC notes to match the current state of affaan-m/everything-claude-code
docs/token-optimization.md and docs/SKILL-PLACEMENT-POLICY.md:

- Drop CLAUDE_AUTOCOMPACT_PCT_OVERRIDE recommendations (now warned against
  upstream — variable can only lower threshold, opposite of intent)
- Add CLAUDE_CODE_SUBAGENT_MODEL=haiku as the new core token-saving setting
- Flag the default `memory` MCP for disablement (no skill/agent/hook references)
- Add Skill Placement Policy section (curated/learned/imported/evolved + provenance)
- Cover missing commands: /checkpoint, /sessions, /security-scan, /claw, /projects

Add new resource: ECC 编排实战手册.md (721 lines). Six orchestration patterns
(dmux+worktree, sequential claude -p, continuous-claude, Ralphinho RFC-DAG,
santa-loop, Task in-process) with real commands, real plan.json structures,
real CLI flags, and explicit "could not verify online" markers for /multi-*
and /feature-dev. All sourced to specific commands/*.md or skills/*.md files.

Cross-link the new manual from 完整指南 and 用法速查.

6 - Zettelkasten/20260319120200 MCP数量与上下文窗口的反比关系.md

@@ -15,7 +15,8 @@ source: "https://github.com/affaan-m/everything-claude-code"
 **最佳实践**:
 - 活跃 MCP <= 10 个，活跃工具总数 <= 80 个
 - 用 `disabledMcpServers` 动态禁用不用的
-- 重操作优先用 CLI（如 `gh`）而不是 MCP
+- **默认安装的 `memory` MCP 没有任何 skill/agent/hook 引用 → 优先关掉**(仓库 `docs/token-optimization.md` 明确建议)
+- 重操作优先用 CLI（如 `gh`、`aws`）而不是 MCP wrapper
 - 使用 `llms.txt` 模式获取文档，避免 MCP 常驻开销
 
 这是 Claude Code 性能优化中**最重要的单一因素** — 比任何 Agent 或 Skill 都重要。