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>

lib/air_runtime/modes/xdb_sdb_ndb_modes.py

@@ -0,0 +1,97 @@
+"""AirXDB mode — V2 GUI调试器，AirSDB mode — V2 静态分析，AirNDB mode — V2 网络调试。"""
+
+# --- AirXDB ---
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+from air_runtime.io import atomic_json_write
+from air_runtime.paths import airplan_root
+from air_runtime.utils import now_iso
+
+
+def _xdb_paths(project_root: Path) -> dict[str, Path]:
+    root = airplan_root(project_root) / "state" / "airxdb"
+    return {"root": root, "state": root / "state.json", "artifacts_dir": root / "artifacts"}
+
+
+def xdb_enter(project_root: Path) -> dict:
+    paths = _xdb_paths(project_root)
+    paths["artifacts_dir"].mkdir(parents=True, exist_ok=True)
+    atomic_json_write(paths["state"], {"enabled": True, "updatedAt": now_iso(),
+                                        "projectRoot": str(project_root)})
+    return {"state_path": str(paths["state"])}
+
+
+def xdb_status(project_root: Path) -> dict:
+    from air_runtime.io import safe_json_load
+    paths = _xdb_paths(project_root)
+    state = safe_json_load(paths["state"]) or {}
+    return {"enabled": state.get("enabled", False)}
+
+
+def xdb_main(args) -> None:
+    project_root = Path(args.project).expanduser().resolve()
+    sub = args.sub or "status"
+    if sub == "enter":
+        result = xdb_enter(project_root)
+        print(f"airplan_mode=xdb\nstate_path={result['state_path']}")
+    else:
+        s = xdb_status(project_root)
+        print(f"airplan_mode=xdb\nenabled={s['enabled']}")
+
+
+# --- AirSDB ---
+
+def _sdb_paths(project_root: Path) -> dict[str, Path]:
+    root = airplan_root(project_root) / "state" / "airsdb"
+    return {"root": root, "state": root / "state.json", "reports_dir": root / "reports"}
+
+
+def sdb_enter(project_root: Path) -> dict:
+    paths = _sdb_paths(project_root)
+    paths["reports_dir"].mkdir(parents=True, exist_ok=True)
+    atomic_json_write(paths["state"], {"enabled": True, "updatedAt": now_iso()})
+    return {"state_path": str(paths["state"])}
+
+
+def sdb_main(args) -> None:
+    project_root = Path(args.project).expanduser().resolve()
+    sub = args.sub or "status"
+    from air_runtime.io import safe_json_load
+    paths = _sdb_paths(project_root)
+    if sub == "enter":
+        result = sdb_enter(project_root)
+        print(f"airplan_mode=sdb\nstate_path={result['state_path']}")
+    else:
+        state = safe_json_load(paths["state"]) or {}
+        print(f"airplan_mode=sdb\nenabled={state.get('enabled', False)}")
+
+
+# --- AirNDB ---
+
+def _ndb_paths(project_root: Path) -> dict[str, Path]:
+    root = airplan_root(project_root) / "state" / "airndb"
+    return {"root": root, "state": root / "state.json", "captures_dir": root / "captures"}
+
+
+def ndb_enter(project_root: Path) -> dict:
+    paths = _ndb_paths(project_root)
+    paths["captures_dir"].mkdir(parents=True, exist_ok=True)
+    atomic_json_write(paths["state"], {"enabled": True, "updatedAt": now_iso()})
+    return {"state_path": str(paths["state"])}
+
+
+def ndb_main(args) -> None:
+    project_root = Path(args.project).expanduser().resolve()
+    sub = args.sub or "status"
+    from air_runtime.io import safe_json_load
+    paths = _ndb_paths(project_root)
+    if sub == "enter":
+        result = ndb_enter(project_root)
+        print(f"airplan_mode=ndb\nstate_path={result['state_path']}")
+    else:
+        state = safe_json_load(paths["state"]) or {}
+        print(f"airplan_mode=ndb\nenabled={state.get('enabled', False)}")