重大重构：引擎模块拆分 + P0插件实现 + 55个Bug修复

核心变更:
- engine.py(1781行)拆分为8个独立模块: lifecycle/security/deps/
  datastore/pl_injector/watcher/signature/manager
- 新增plugin-bridge: 事件总线 + 服务注册 + RPC通信
- 新增i18n: 国际化/多语言翻译支持
- 新增plugin-storage: 插件键值/文件存储
- 新增ws-api: WebSocket实时通信(pub/sub + 自定义处理器)
- nodejs-adapter统一为Plugin ABC模式

Bug修复:
- 修复load_all()中store_dir未定义崩溃
- 修复DependencyResolver入度计算(拓扑排序)
- 修复PermissionError隐藏内置异常
- 修复CORS中间件头部未附加到响应
- 修复IntegrityChecker跳过__pycache__目录
- 修复版本号不一致(v2.0.0→v1.2.0)
- 修复测试文件的Logger导入/路径/私有方法调用
- 修复context.py缺少typing导入
- 修复config.py STORE_DIR默认路径(./mods→./store)

测试覆盖: 14→91个测试, 全部通过

oss/core/deps.py

@@ -0,0 +1,48 @@
+from typing import Optional, Callable
+
+
+class DependencyError(Exception):
+    pass
+
+
+class DependencyResolver:
+    def __init__(self):
+        self.graph: dict[str, list[str]] = {}
+
+    def add_dependency(self, name: str, dependencies: list[str]):
+        self.graph[name] = dependencies
+
+    def resolve(self) -> list[str]:
+        self._detect_cycles()
+
+        in_degree: dict[str, int] = {name: 0 for name in self.graph}
+        who_depends_on: dict[str, list[str]] = {name: [] for name in self.graph}
+
+        for name, deps in self.graph.items():
+            for dep in deps:
+                if dep in in_degree:
+                    in_degree[name] += 1
+                    who_depends_on[dep].append(name)
+
+        queue = [name for name, degree in in_degree.items() if degree == 0]
+        result = []
+
+        while queue:
+            node = queue.pop(0)
+            result.append(node)
+            for dependent in who_depends_on.get(node, []):
+                in_degree[dependent] -= 1
+                if in_degree[dependent] == 0:
+                    queue.append(dependent)
+
+        if len(result) != len(self.graph):
+            raise DependencyError("无法解析依赖，可能存在循环依赖")
+
+        return result
+
+    def _detect_cycles(self):
+        all_deps = set()
+        for deps in self.graph.values():
+            all_deps.update(deps)
+        all_plugins = set(self.graph.keys())
+        return list(all_deps - all_plugins)