feat: AirPlan V2 — 全专家插件强制路由 + 事件系统规范化

P0-8 扩大: do_mode.py finish_worker 全专家插件强制路由
- GUI→XDB, network→NDB, C/C++→SDB, done→Rvr, blocked/failed→Dbg
- 证据去重: 已有 xdbSessions/ndbSessions/sdbReports/rvrReviewed 则跳过

P1-GAP17: 事件 emit 规范化
- 新增 7 个事件常量 (TASK_ENTERED, TASK_FINISHED, ENGINE_ENTERED 等)
- 全部 emit 调用替换字符串字面量为常量，零残留
- 30 个事件类型常量全部定义且唯一

P1-GAP18: 事件日志原子轮转
- emit 计数器每 128 次检查轮转，避免每次 emit 读文件
- 清除未使用的 _emit_with_completion/_pending_merge_complete
- 原子轮转: tempfile+os.replace 保证不损坏

eng 极端接管: 强制调用全部专家插件 (Dbg/XDB/NDB/SDB/Rvr)
commands/do.md: 更新为全专家插件路由文档

全量测试: 69 通过, 0 失败

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

test_xdb_sdb_ndb.py

@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+"""Xdb/Sdb/Ndb Mode 功能测试"""
+
+import sys
+import os
+import tempfile
+import json
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).parent / "lib"))
+
+def test_xdb_enter():
+    """测试 GUI 验证器初始化"""
+    from air_runtime.modes.xdb_sdb_ndb_modes import xdb_enter
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        project_root = Path(tmpdir)
+
+        result = xdb_enter(project_root)
+        assert "state_path" in result
+        assert Path(result["state_path"]).exists()
+
+        print("✓ Xdb 初始化测试通过")
+    return True
+
+
+def test_sdb_enter():
+    """测试静态分析器初始化"""
+    from air_runtime.modes.xdb_sdb_ndb_modes import sdb_enter
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        project_root = Path(tmpdir)
+
+        result = sdb_enter(project_root)
+        assert "state_path" in result
+        assert Path(result["state_path"]).exists()
+
+        print("✓ Sdb 初始化测试通过")
+    return True
+
+
+def test_ndb_enter():
+    """测试网络调试器初始化"""
+    from air_runtime.modes.xdb_sdb_ndb_modes import ndb_enter
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        project_root = Path(tmpdir)
+
+        result = ndb_enter(project_root)
+        assert "state_path" in result
+        assert Path(result["state_path"]).exists()
+
+        print("✓ Ndb 初始化测试通过")
+    return True
+
+
+def main():
+    print("=" * 50)
+    print("Xdb/Sdb/Ndb Mode 功能测试")
+    print("=" * 50)
+
+    tests = [
+        ("Xdb 初始化", test_xdb_enter),
+        ("Sdb 初始化", test_sdb_enter),
+        ("Ndb 初始化", test_ndb_enter),
+    ]
+
+    passed = 0
+    failed = 0
+
+    for name, test_fn in tests:
+        try:
+            test_fn()
+            passed += 1
+        except Exception as e:
+            print(f"✗ {name} 失败: {e}")
+            import traceback
+            traceback.print_exc()
+            failed += 1
+
+    print("=" * 50)
+    print(f"测试结果: {passed} 通过, {failed} 失败")
+    print("=" * 50)
+
+    return failed == 0
+
+
+if __name__ == "__main__":
+    success = main()
+    sys.exit(0 if success else 1)