**Description** Set up the project structure for the EventRegistry DApp using Foundry on Base Sepolia. **Tasks** - [ ] Initialize Foundry project (`forge init`) - [ ] Add `EventRegistry.sol` to `/src` folder - [ ] Configure `foundry.toml` for Base Sepolia RPC - [ ] Add `.env` for PRIVATE_KEY and RPC_URL - [ ] Add `README.md` and `.gitignore` **Deliverables** - [ ] Foundry compiles successfully (`forge build`) - [ ] Project ready for contract development **Labels:** `setup`, `backend`