docs: update README with v1.9.0 deployment addresses

[ypatil12]

Motivation:

The v1.9.0 release has been deployed across mainnet, base, sepolia, hoodi, and base sepolia. The README needs to reflect the updated version references and new implementation addresses for all contracts.

Modifications:

• Updated all environment version references from v1.8.1/v1.9.0-rc.0 to v1.9.0
• Updated all contract source code links from older versions (v1.3.0, v1.6.0, v1.8.1) to v1.9.0
• Updated implementation addresses for all core contracts (DelegationManager, StrategyManager, EigenPodManager, AVSDirectory, RewardsCoordinator, PermissionController, AllocationManager)
• Added new ProtocolRegistry contract entry
• Updated implementation addresses for all strategies, EigenPod, EigenStrategy, tokens, AVS contracts, multichain contracts, and PauserRegistry
• Updated Base deployment addresses and added new contracts (ProtocolRegistry, OperatorTableUpdater, ECDSACertificateVerifier, BN254CertificateVerifier, KeyRegistrar)
• Updated testnet (Sepolia, Hoodi, Base Sepolia) deployment addresses

Result:

README accurately reflects the current v1.9.0 deployment state across all networks.

[claude]

Claude encountered an error after 1m 26s —— View job

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Reviewing v1.9.0 deployment address updates

Tasks

• Read and understand the changed files
• Review version reference consistency
• Review deployment address updates and formatting
• Check typos-cli.toml changes
• Provide final review feedback

[nadir-akhtar]

Spot checked against internal doc, LGTM