Add omni-service-node — 56 data endpoints for Claude agents

MCP server with 56 pay-per-call data endpoints. Works with Claude Code agents. Trading signals, macro economics, geopolitical intel, crypto/DeFi, SEC filings, ArXiv research. USDC on Base Mainnet. https://github.com/Luckkyyy23/omni-service-node | Smithery: https://smithery.ai/server/@luckkyyy23/omni-service-node