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.

infra/systemd/tjwater-operational-worker.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=TJWater investigation task worker
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+WorkingDirectory=%h/NextTJWater/next-tjwater-server
+ExecStart=%h/miniconda3/envs/server/bin/python scripts/run_operational_worker.py
+Restart=on-failure
+RestartSec=5
+UMask=0077
+
+[Install]
+WantedBy=default.target