feat(server): integrate MCP queries and investigation messaging

Add project-bound OAuth MCP queries and controlled analysis with scoped evidence,
limits, timeouts and a nearby-model spatial query using EPSG:4326 inputs.
Default nearby searches to 200 meters and five results.

Integrate investigation messaging/presentation, health/readiness and typed history;
remove duplicate web search and fix online simulation and compressed baseline writes.
Include project migrations 023-025; keep local credentials and demo seeding excluded.

Validation: 319 focused pytest checks; real PostGIS temporary-table regression;
read-only Jinqian bridge radius comparison; cross-language MCP discovery/calls.

app/main.py

@@ -1,11 +1,12 @@
 from fastapi import FastAPI
-from contextlib import asynccontextmanager
+from contextlib import asynccontextmanager, AsyncExitStack
 from fastapi.middleware.gzip import GZipMiddleware
 from fastapi.middleware.cors import CORSMiddleware
 import logging
 from datetime import datetime
 
 from app.api.problem_details import install_problem_details_handlers
+from app.api.health import router as health_router
 from app.api.v1.rest_router import api_router
 from app.infra.db.dynamic_manager import project_connection_manager
 from app.infra.db.postgresql.workbench_event_hub import workbench_event_hubs
@@ -24,13 +25,21 @@ logger.setLevel(logging.INFO)
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
+    app.state.startup_complete = False
     logger.info("**********************************************************")
     logger.info(str(datetime.now()))
     logger.info("TJWater CloudService is starting...")
     logger.info("**********************************************************")
 
     try:
-        yield
+        async with AsyncExitStack() as stack:
+            if mcp_runtime is not None:
+                await stack.enter_async_context(mcp_runtime.lifespan())
+            app.state.startup_complete = True
+            try:
+                yield
+            finally:
+                app.state.startup_complete = False
     finally:
         await workbench_event_hubs.close_all()
         await project_connection_manager.close_all()
@@ -40,6 +49,14 @@ async def lifespan(app: FastAPI):
         logger.info("Database connections closed")
 
 
+# Disabled deployments do not import the MCP SDK or acquire business credentials.
+from app.mcp.config import McpSettings
+mcp_settings = McpSettings()
+mcp_runtime = None
+if mcp_settings.enabled:
+    from app.mcp.application import McpQueryApplication
+    mcp_runtime = McpQueryApplication(mcp_settings)
+
 # 根据环境配置决定是否启用文档
 is_production = settings.ENVIRONMENT.lower() == "production"
 
@@ -56,8 +73,13 @@ app = FastAPI(
 
 
 # Include Routers
+app.state.startup_complete = False
+app.include_router(health_router)
 app.include_router(api_router, prefix="/api/v1")
 install_problem_details_handlers(app)
+from app.api.v1.endpoints.mcp_queries import router as mcp_context_router
+app.state.mcp_runtime = mcp_runtime
+app.include_router(mcp_context_router, prefix="/api/v1")
 # Legacy routers without version prefix
 # app.include_router(api_router)
 
@@ -65,6 +87,9 @@ install_problem_details_handlers(app)
 app.add_middleware(GZipMiddleware, minimum_size=1000)
 # 添加审计中间件（可选，记录关键操作）
 app.add_middleware(AuditMiddleware)
+if mcp_runtime is not None:
+    from app.mcp.dispatch import McpDispatchMiddleware
+    app.add_middleware(McpDispatchMiddleware, runtime=mcp_runtime)
 # 配置 CORS 中间件
 # 确保这是你最后一个添加的 app.add_middleware
 app.add_middleware(