feat: base testnet deployment

[nvtaveras]

Summary

• Adds Base Configuration config with a single EURm/EURC FPMM pool using ReserveLiquidityStrategy.
• Wires up the EURC/EUR rate feed as a Chainlink relayer derived from EURC/USD * 1/(EUR/USD) (inverted), with maxTimestampSpread = 1 day.

Other changes

• Fixed some workarounds which we did for deploying on polygon the other day by setting the polygon mainnet config to 1 week. This is now done properly where the mainnet value has the correct expected expiry time, and it's overridden on testnets when needed.

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Note

Low Risk
Low risk since this PR only updates deployment/config artifacts (addresses, registries, and broadcast logs) with no contract or application logic changes; main risk is misconfigured addresses/chain IDs leading to incorrect deployments or integrations.

Overview
Adds Base chain (84532) configuration entries, including MigrationMultisig/ReserveSafe/fee roles in .treb/addressbook.json.

Extends .treb/deployments.json and .treb/registry.json with a new testnet-v2-rc5 deployment set on 84532 (core v3 components like ReserveV2, Router, FPMMFactory/FPMM, StableTokenSpoke/EURm proxy, oracle/breaker contracts, and mock assets/feeds).

Checks in broadcast run artifacts for ConfigureV3PreStage and CreateFPMM on 84532, documenting the on-chain calls used to wire breakers/spenders and deploy/seed the EURm/EURC FPMM pool.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

There are 4 total unresolved issues (including 3 from previous reviews).

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