sync: BOWEI 2026-09-07 tools-sync 改为 junction 模型（registry 双向 ingest + 修复）

- sync_repos.ps1: 每个 skill 只在 ~\.claude\skills 有一份物理副本，其余 registry
  一律 junction；新增 registry-only skill 的自动 ingest、MISDIRECTED 链接修复、
  同名内容分叉的 CONFLICT 报告，以及只对 -MirrorRegistry 做全量镜像。
- SKILL.md: 重写阶段 1/2，补 Codex MCP 存储模型（config.toml 惰性，
  codex mcp list --json 是唯一权威口径）与 CLI 升级会清空注册表的事实。
- sync_mcp_registrations.ps1 + references/codex_mcp_wanted_keys.json:
  报告 codex-cli 无接口可设的键（tool_timeout_sec / env_vars）为
  "registered, but incomplete" 而非失败。
- tests/test_sync_repos_registries.ps1: registry 对账的回归测试。
- .gitignore: orchestration（Orca 自带的发现桩，同 orca-cli）列为 local-only。

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01438Zbcx49e4o46uSA71mFF

tools-sync/tests/test_sync_mcp_registrations.ps1

@@ -38,8 +38,10 @@ command = "C:\\Users\\tester\\.codex\\runtimes\\node_repl.exe"
 
     $oldErrorActionPreference = $ErrorActionPreference
     $ErrorActionPreference = "Continue"
+    # -CodexSource Toml pins the read to the fixture; the default Auto path would query the
+    # real `codex mcp list` and make this test measure the machine instead of the fixtures.
     $output = & powershell -NoProfile -ExecutionPolicy Bypass -File $scriptUnderTest `
-        -ClaudeConfig $claudeConfig -CodexConfig $codexConfig -Verbose 2>&1 | Out-String
+        -ClaudeConfig $claudeConfig -CodexConfig $codexConfig -CodexSource Toml -Verbose 2>&1 | Out-String
     $code = $LASTEXITCODE
     $ErrorActionPreference = $oldErrorActionPreference
     if ($code -ne 2) { throw "expected audit exit 2, got $code`n$output" }