prepare

Add Three Markets integration test to verify economy logic

Add Web3-style Cryptographic Identity (Ed25519 signatures)

Add Data Market (Negative Bounties) and Security Switches

Add MEP CLI Provider for autonomous terminal agents

Rename mep_miner to mep_provider for legal safety

Upgrade to Phase 2 (Auction Logic) to save API costs

Add Direct Messaging and Zero-Bounty features

Add legal safeguards and rename mine->idle

Add L2 client and Reputation logic