XAUt supply cap and debt celling adjustment

[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 implements a proposal to increase XAUt supply cap and debt ceiling on Aave V3 Ethereum based on strong utilization and demand signals.

Key changes:

• Increases XAUt supply cap from 5,000 to 10,000
• Increases XAUt debt ceiling from $3,000,000 to $25,000,000

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
config.ts	Defines proposal configuration with supply cap and debt ceiling updates for XAUt
AaveV3Ethereum_XAUtCapAdjustment_20251201.sol	Implements the payload contract to execute the parameter changes
XAUtCapAdjustment_20251201.s.sol	Contains deployment and proposal creation scripts
XAUtCapAdjustment.md	Provides detailed analysis and rationale for the parameter adjustments
AaveV3Ethereum_XAUtCapAdjustment_20251201.t.sol	Contains test suite for the proposal
diffs/AaveV3Ethereum_XAUtCapAdjustment_20251201_before_AaveV3Ethereum_XAUtCapAdjustment_20251201_after.md	Shows the expected state changes after proposal execution

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