Wire deal-pusher to on-chain PDP adapter

[anjor]

Summary

• add a concrete on-chain PDP adapter in service/dealpusher that implements:
  • PDPProofSetManager (EnsureProofSet, QueueAddRoots)
  • PDPTransactionConfirmer (WaitForConfirmations)
• initialize FEVM network + PDPVerifier contract once, and reuse for schedule execution
• wire run deal-pusher to inject PDP dependencies when --eth-rpc (or ETH_RPC_URL) is configured
• keep market-only behavior unchanged when no FEVM RPC is configured
• add focused tests for confirmation handling and tx-hash validation

Validation

• go test ./service/dealpusher
• go test ./cmd/run

Notes

• this work is intentionally unblocked from Add explicit deal type support for schedules #623 and add Deal.WalletID, decouple from Actor FK #627; it provides production runtime wiring for PDP on-chain operations