evm: dapp compatibility test suite (Uniswap/Jeskei)

[TheNewAutonomy]

Goal

Be able to reliably deploy and test real-world EVM contracts (e.g. Uniswap, Jeskei) with repeatable tooling and clear pass/fail gates.

Scope

• Build a contract test harness that targets Catalyst RPC:
  • deploy
  • call
  • state-changing transactions
  • event/log indexing expectations
• Add a curated suite:
  • ERC20 baseline
  • Uniswap (subset) smoke tests
  • Jeskei (as specified)
• Document known incompatibilities and required RPC surface

Acceptance criteria

• Test suite runs in CI against a local 3-node network (or single-node devnet)
• Produces a clear report of which contract features work and which do not
• Blocks mainnet release until the required subset passes

Refs: #209 (ABI/logs/events/receipts), #187 (RPC epic).