[SRE-005] All MCP servers DOWN in default setup (order-executor, risk-analyzer, technical-indicators)

Paper trading system has 4 MCP servers that should run alongside the API but none are started — trading agents have no tools available.

**Evidence:**
```
curl http://localhost:8091/health → connection refused
curl http://localhost:8092/health → connection refused
curl http://localhost:8093/health → connection refused
```

**File:** Taskfile.yml:~1
**Agent:** SRE-005