feat(search): __init__.py 公开 API + 修复 OCR 测试 asyncio 兼容性

app/search/__init__.py

@@ -0,0 +1,13 @@
+"""搜索 Agent 装配层 — prompt 管理、skill 注册、工具分发、LLM 摘要、视觉观察。"""
+
+from app.search.prompt import PromptManager
+from app.search.skills import SkillRegistry, discover_skills
+from app.search.tools import SearchToolDispatcher, get_tool_descriptions
+
+__all__ = [
+    "PromptManager",
+    "SkillRegistry",
+    "SearchToolDispatcher",
+    "discover_skills",
+    "get_tool_descriptions",
+]