feat: polygon & base contract deployment addresses

[nvtaveras]

Summary

• Add deployment addresses (USDC/EURC, MigrationMultisig, ProtocolFeeRecipient, FeeSetter, ReserveSafe) to Polygon (137) and Base (8453) in the addressbook
• Skip DeployMockAggregators early when no mock aggregators are configured for the target chain
• Log deployed MockChainlinkAggregator addresses for visibility

Test plan

• Verify addressbook entries match the canonical addresses for Polygon and Base
• Run DeployMockAggregators against a chain without mock aggregator configs and confirm it skips cleanly
• Run DeployMockAggregators against a chain with mock aggregator configs and confirm deployments + logs

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Note

Medium Risk
Moderate risk because it updates chain-specific contract/token addresses used for deployments/configuration, where mistakes can misroute funds or permissions; script changes are small and mostly add guardrails/logging.

Overview
Adds Polygon (137) and Base (8453) entries to .treb/addressbook.json for deployed contracts/tokens (e.g., USDC/EURC, MigrationMultisig, ReserveSafe, FeeSetter, ProtocolFeeRecipient).

Updates DeployMockAggregators.s.sol to early-exit when no mock aggregator configs exist for the target chain, and to log each deployed MockChainlinkAggregator address for easier verification.

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