[FEATURE] [Coinswap] Migrate Taker RPC to mill-rpc

[hulxv]

Description

Migrate the Taker RPC server from current implementation to mill-rpc framework.

Motivation

Start with Taker as it's simpler than Maker, providing a good learning experience.

Migration Steps

1. Create new Taker RPC using mill-rpc
2. Port all endpoints
3. Add middleware (auth, logging)
4. Port tests
5. Run side-by-side comparison
6. Switch over

Tasks

• Create new TakerRpcServer using mill-rpc
• Port create_swap endpoint
• Port get_swap_status endpoint
• Port list_swaps endpoint
• Port cancel_swap endpoint
• Port wallet operations
• Add authentication middleware
• Add logging middleware
• Port unit tests
• Port integration tests
• Run performance benchmarks
• Compare with old implementation
• Document changes