feat: Migrate proxy to Diamond pattern (ERC-2535)

[zguesmi]

Migration steps:

• Migrate src files (minimal changes)
• Modify receive and fallback behavior in Diamond.sol
• Rename all 1538 to 2535 in contracts and rename Module to Facet in contracts names
• Add unit tests for Diamond.sol
• Remove ENSIntegration modules/functions
• Update all facets to use namespaces app storage.
• Rename only ✔️ feat: Use namespaced storage #236
• Fix compilation and tests ✔️ fix: Fix build with new storage layout #237
• Update contracts file tree.
• Target latest EVM version instead of Berlin
• Merge feature/diamond in develop
• Merge PR Update deployment CI #228
• Set admin in deployment script
• Save IexecLibOrders_v5 in config.json
• Update docs (soldoc, diagrams, ...)

[codecov]

Codecov Report

❌ Patch coverage is 78.78788% with 133 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.66%. Comparing base (f83a6cf) to head (b4963d2).
⚠️ Report is 105 commits behind head on develop.

Files with missing lines	Patch %	Lines
contracts/facets/IexecEscrowTokenSwapFacet.sol	0.00%	70 Missing ⚠️
contracts/facets/IexecEscrowNativeFacet.sol	0.00%	36 Missing ⚠️
contracts/tools/TimelockController.sol	0.00%	17 Missing ⚠️
contracts/facets/FacetBase.v8.sol	28.57%	5 Missing ⚠️
contracts/facets/IexecPocoAccessorsFacet.sol	0.00%	4 Missing ⚠️
contracts/facets/IexecConfigurationFacet.sol	97.14%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #241      +/-   ##
===========================================
- Coverage    84.50%   83.66%   -0.85%     
===========================================
  Files           35       38       +3     
  Lines         1084     1218     +134     
  Branches       221      227       +6     
===========================================
+ Hits           916     1019     +103     
- Misses         168      199      +31     

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[Copilot]

Pull Request Overview

This PR migrates the Iexec smart contracts from the EIP-1538 proxy pattern to the Diamond pattern (ERC-2535), representing a significant architectural upgrade. The migration introduces a new proxy structure with Diamond facets for improved modularity and upgradability.

Key changes include:

• Introduction of Diamond pattern proxy architecture with facets
• Removal of ENS integration modules and functions
• Updates to deployment configurations across testnet environments

Reviewed Changes

Copilot reviewed 144 out of 182 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
deployments/arbitrumSepolia/ReverseRegistrar.json	Updated deployment address and added constructor arguments for ENS components
deployments/arbitrumSepolia/RLC.json	Incremented deployment counter for token contract
deployments/arbitrumSepolia/PublicResolver.json	Updated ENS resolver address and added constructor parameters
deployments/arbitrumSepolia/OwnershipFacet.json	New Diamond facet for ownership management functionality
deployments/arbitrumSepolia/LibDiamond.json	New Diamond library deployment for core Diamond pattern functionality
deployments/arbitrumSepolia/IexecRelayDelegate.json	Updated relay delegate address and removed ownership-related ABI entries

[Copilot]

The ABI contains duplicate OwnershipTransferred events (lines 20-38 and 40-57). This duplication could cause confusion for developers integrating with the contract and may indicate an issue with the ABI generation process.

[zguesmi]

Bypassing Codecov fail status due to heavy refactoring: