Add SafeAgent (Aigen-Protocol) - crypto/DeFi token safety MCP

[Aigen-Protocol]

Adds SafeAgent to the MCP Security Servers section.

What it is
MCP server providing crypto/DeFi token safety primitives for AI agents:

• 27 scam pattern detection (Solidity source-code analysis)
• Real DEX swap simulation for honeypot detection (not just code analysis)
• 6 EVM chains: Ethereum, Base, Optimism, Arbitrum, Polygon, BSC
• 38 MCP tools, free during beta, no auth required

Why it belongs in security MCPs
Crypto trading is one of the few domains where an LLM agent making a wrong call costs the user immediately measurable money. Every other agent in this list catches a vulnerability somewhere (code, network, identity); SafeAgent catches it at the swap call site via:

• on-chain ERC-7913 safety oracle (Base 0x37b9e9B8789181f1AaaD1cD51A5f00A887fa9b8e)
• SafeRouter contract (Base 0xF6EFc5D5902d1a0ce58D9ab1715Cf30f077D8f6e) that atomically reverts unsafe swaps with structured custom error data
• HMAC-SHA256 signed webhook alerts on wallet score changes (the /watch endpoint)

Live

• Endpoint: POST https://cryptogenesis.duckdns.org/mcp (streamable-http)
• Stats: https://cryptogenesis.duckdns.org/stats
• Source: https://github.com/Aigen-Protocol/aigen-protocol

Closes #116