feat(solidity): improve Sepolia deploy behavior and wallet registry flows

[lionakhnazarov]

Stack Context

This is PR 2/4 in the reorganization stack.
Base: #3999 (stack/testnet4-01-ci-yarn)
Next: #4001

What Changed

1) ECDSA deploy/runtime logic

• Contract-level adjustments:
  • solidity/ecdsa/contracts/WalletRegistry.sol
• Deploy script updates for deployment flow and account/approval behavior:
  • solidity/ecdsa/deploy/00_resolve_reimbursement_pool.ts
  • solidity/ecdsa/deploy/00_resolve_token_staking.ts
  • solidity/ecdsa/deploy/01_deploy_ecdsa_sortition_pool.ts
  • solidity/ecdsa/deploy/02_deploy_dkg_validator.ts
  • solidity/ecdsa/deploy/03_deploy_wallet_registry.ts
  • solidity/ecdsa/deploy/07_approve_wallet_registry.ts
  • solidity/ecdsa/deploy/09_deploy_wallet_registry_governance.ts
• Added verification helper:
  • solidity/ecdsa/deploy/etherscanVerification.ts
• Hardhat runtime/config updates:
  • solidity/ecdsa/hardhat.config.ts
• Wallet owner initialization logic update:
  • solidity/ecdsa/tasks/initialize-wallet-owner.ts

2) ECDSA test/fixture/type updates

• Tests:
  • solidity/ecdsa/test/WalletRegistry.Authorization.test.ts
  • solidity/ecdsa/test/WalletRegistry.CustomErrors.test.ts
  • solidity/ecdsa/test/WalletRegistry.Rewards.test.ts
  • solidity/ecdsa/test/WalletRegistry.Slashing.test.ts
  • solidity/ecdsa/test/WalletRegistry.Upgrade.test.ts
  • solidity/ecdsa/test/WalletRegistry.WalletCreation.test.ts
  • solidity/ecdsa/test/WalletRegistryGovernance.test.ts
• Fixtures/utilities:
  • solidity/ecdsa/test/fixtures/index.ts
  • solidity/ecdsa/test/utils/operators.ts
• Added types:
  • solidity/ecdsa/types/TokenStaking.extensions.d.ts
  • solidity/ecdsa/types/chai.d.ts

3) Random beacon deploy/config/test alignment

• Deploy/config:
  • solidity/random-beacon/deploy/05_approve_random_beacon_in_token_staking.ts
  • solidity/random-beacon/hardhat.config.ts
• Tests/fixtures/utilities:
  • solidity/random-beacon/test/RandomBeacon.Authorization.test.ts
  • solidity/random-beacon/test/RandomBeacon.Callback.test.ts
  • solidity/random-beacon/test/RandomBeacon.GroupCreation.test.ts
  • solidity/random-beacon/test/RandomBeacon.Relay.test.ts
  • solidity/random-beacon/test/RandomBeacon.Rewards.test.ts
  • solidity/random-beacon/test/system/e2e.test.ts
  • solidity/random-beacon/test/fixtures/index.ts
  • solidity/random-beacon/test/utils/operators.ts
• Added types:
  • solidity/random-beacon/types/TokenStaking.extensions.d.ts

4) Embedded export deploy scripts for ECDSA external random-beacon export

• Added scripts under:
  • solidity/ecdsa/external/random-beacon-export/deploy/01_*.js ... 09_*.js

Out of Scope

• Generated deployments/sepolia JSON snapshots (handled in chore(deployments): add Sepolia deployment artifacts #4001).
• Go/Testnet4 runtime changes (handled in feat(go): add testnet4 mapping and harden runtime integration behavior #4002).

Test Plan

• cd solidity/ecdsa && yarn test
• cd solidity/random-beacon && yarn test
• Spot-check deployment flows for expected skip/redeploy behavior.