Clean up off-chain USDC ARM components

[naddison36]

Summary

Clean up the off-chain configuration following deployment of the new USDC ARM in #315.

This replaces the remaining legacy USD ARM references across Hardhat tasks, Talos actions, schedules, and deployment records with the canonical USDC ARM configuration.

Changes

USDC ARM configuration

• Point JavaScript tasks and Talos actions to the new USDC ARM proxy:
  • 0x9E3A7026E5767F2d7Ff5e83b0ed011005f45a170
• Make usdc the canonical ARM identifier.
• Reject the legacy usd identifier to prevent accidentally resolving the superseded USD ARM.
• Rename the USDC Talos actions:
  • setPricesUSDC
  • allocateUSDC
  • collectUSDCFees
  • autoRequestUSDCWithdraw
  • autoClaimUSDCWithdraw

Generic Hardhat tasks

Add USDC support to the shared tasks by deriving token decimals on-chain:

• swap
• allocate
• collectFees
• setLiquidityProviderCaps
• setTotalAssetsCap

Update the relevant --arm help text to include USDC.

Shared pause action

• Replace the separate pauseLido, pauseEtherFi, and pauseEthena actions with the shared action:

  pnpm hardhat pause --arm <arm> --network mainnet

• Support lido, etherfi, ethena, oeth, and usdc.

• Replace the per-ARM Talos pause schedules with one disabled manual Pause ARM - Mainnet schedule.

Talos schedules

• Rename the legacy USD schedule names and commands to USDC.
• Remove the superseded USD and per-ARM pause schedule rows before inserting their replacements.
• Update the Talos action documentation.

Deployment records

• Remove the eight legacy USD_ARM* contract records from build/deployments-1.json.
• Retain the historical 037_DeployUSDARMScript execution record.
• Resolve the reused Paxos adapter proxies through:
  • USDC_ARM_PYUSD_ADAPTER
  • USDC_ARM_USDG_ADAPTER

Operational follow-up

After merging:

1. Build and publish the new arm-oeth runner image.
2. Propose and deploy the new image through the Talos release workflow.
3. Apply migrations/seed_schedules.sql to remove the legacy schedules and insert the USDC/shared-action replacements.

New schedules remain disabled by default.

[clement-ux]

LGTM