feat: dual locker owner (Agent wallet as co-owner)

[0xPilou]

Summary

• Adds an optional locker owner agent to FluidLocker: the owner can register an agent wallet via setLockerOwnerAgent(agentWallet, signature), verified against the AGENT_WALLET_VERIFIER signer. The onlyLockerOwner modifier now accepts either the locker owner or their registered agent.
• Adds Agent wallet as co-owner of the reserve.
• New deployment tooling: AddressRegistry config, abstract SupDeployer, and upgrade scripts for the Locker, Factory, Fontaine, Program Manager, and StakingRewardController implementations (older one-off scripts archived).
• Tests: dual-owner test coverage in FluidLocker.t.sol, fuzz parameter guards in SFTest.t.sol (excludes address(0)/agent collisions that made testV2withdrawDustETH fail), and fork test updates for the new constructor and SPR contract owner.

Test plan

• forge test — including the previously failing testV2withdrawDustETH fuzz test, now passing

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