Aavechan/usdg listing

[NandyBa]

Pre-review checklist:

• I have run a spell check on the write-up and made sure no typos exist.
• References to Snapshot/governance forum are correct on the AIP. If no snapshot exists, make sure no TODO's exist.
• The specification on the writeup is aligned with the forum, snapshot, and the payload contract. If there are any changes, they are explicitly mentioned/communicated.
• Minimal tests exist, and the snapshot diff report generated is the latest one and aligned with the payload.
• If deploy scripts are manually updated from the generated ones, I have carefully validated that they are correct, including the deploy commands and the proposal-creation script.
• If the aave-helpers submodule is updated, I have validated it is pointing to the latest version.
• I have validated that no unused files and imports are being added.
• For an asset listing, the write-up includes a detailed specification of the price feed used, CAPO adapters (with each CAPO layer described separately), and eModes (with tables) if changed.
• Wherever possible, I have validated that addresses from the address book are used instead of raw addresses.

[Copilot]

Pull request overview

This PR onboards USDG, a Paxos-issued USD-backed stablecoin, to Aave V3 Ethereum Core Instance. USDG will be available for deposits (to earn yield) and borrowing, but not initially as collateral. The listing uses a hardcoded $1 price oracle to prevent exploitation through temporary market deviations.

Key Changes:

• Adds USDG asset listing configuration with 30M supply cap and 25M borrow cap
• Implements hardcoded $1 price feed to mitigate oracle manipulation risks
• Configures emission admin for potential future incentive programs

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
config.ts	Defines USDG asset listing parameters including caps, interest rate model, and oracle configuration
AaveV3Ethereum_USDGListing_20251205.sol	Implements payload contract for USDG listing with seed funding and emission admin setup
AaveV3Ethereum_USDGListing_20251205.t.sol	Adds test coverage for USDG listing execution and emission admin configuration
USDGListing_20251205.s.sol	Provides deployment and proposal creation scripts for the USDG listing
USDGListing.md	Contains comprehensive documentation of the proposal including parameters, rationale, and oracle design
lib/aave-helpers	Updates aave-helpers submodule to latest version
diffs/AaveV3Ethereum_USDGListing_20251205_before_AaveV3Ethereum_USDGListing_20251205_after.md	Generated diff report showing state changes from the proposal execution

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