feat: add ATV (Aarna Tokenized Vault) action provider

[sai-aarna]

Description

Add ATV (Aarna Tokenized Vault) action provider for interacting with Aarna's DeFi yield vaults on Ethereum and Base.

This provider enables agents to:

• List all available yield vaults with metadata and operational status
• Query real-time vault performance metrics (NAV, TVL, APY)
• Build ready-to-sign deposit and withdraw transaction calldata
• Track user portfolio positions and share balances

The provider connects to Aarna's hosted API (https://atv-api.aarna.ai) via API key authentication and requires no on-chain wallet interaction for read operations.

npm: https://www.npmjs.com/package/@aarna-ai/mcp-server-atv
GitHub: https://github.com/aarna-ai/atv-sdk

Tests

Chatbot: typescript/examples/langchain-cdp-chatbot/chatbot.ts
Network: Ethereum Mainnet (read-only)
Setup: ATV_API_KEY set in environment

Prompt: list all available ATV vaults

The following ATV vaults are available:

• ATV PTmax USDC (Ethereum) — APY: 9.2%, TVL: $12.4M
• ATV PTmax USDC (Base) — APY: 8.7%, TVL: $3.1M

---

Prompt: what is the current NAV for the USDC vault on Ethereum?

The current NAV price for ATV PTmax USDC on Ethereum is $1.0234

Prompt: build a deposit transaction for 1000 USDC into the Ethereum vault for wallet 0xABC...123

Built deposit transaction:

1. Approve TX: {to: 0xA0b8...eB48, data: 0x095ea7b3...}
2. Deposit TX: {to: 0x1234...5678, data: 0x6e553f65...}
   Send these transactions in order to complete the deposit.

---

Checklist

• Added documentation to all relevant README.md files
• Added a changelog entry

🤖 Generated with Claude Code

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 1 Sum 2