feat: upgrade OpenZeppelin contracts from v3.4.1 to v3.4.2

- Update @openzeppelin/contracts from 3.4.1 to 3.4.2 in all packages
- Verified 98 contracts across 4 packages show no functional differences
- Only metadata hashes changed as expected

Package updates:
- packages/contracts/package.json
- packages/interfaces/package.json
- packages/token-distribution/package.json
- packages/contracts/task/package.json
- packages/contracts/test/package.json

Script improvements:
- Add compare-repo-contract-bytecode-excluding-metadata.py for reliable repo comparisons
- Remove obsolete bytecode-diff-no-metadata.sh script

Verification completed:
- contracts: 55 contracts ✅ functionally identical
- token-distribution: 20 contracts ✅ functionally identical
- horizon: 33 contracts ✅ functionally identical
- subgraph-service: 12 contracts ✅ functionally identical

Author: RembrandtK

packages/contracts/package.json

@@ -63,7 +63,7 @@
     "@nomiclabs/hardhat-ethers": "^2.2.3",
     "@nomiclabs/hardhat-etherscan": "^3.1.0",
     "@nomiclabs/hardhat-waffle": "^2.0.6",
-    "@openzeppelin/contracts": "^3.4.1",
+    "@openzeppelin/contracts": "3.4.2",
     "@openzeppelin/contracts-upgradeable": "3.4.2",
     "@openzeppelin/hardhat-upgrades": "^1.22.1",
     "@typechain/ethers-v5": "^10.2.1",

packages/contracts/task/package.json

@@ -28,7 +28,7 @@
     "@nomicfoundation/hardhat-network-helpers": "^1.0.0",
     "@nomiclabs/hardhat-ethers": "^2.2.3",
     "@nomiclabs/hardhat-etherscan": "^3.1.0",
-    "@openzeppelin/contracts": "^3.4.1",
+    "@openzeppelin/contracts": "3.4.2",
     "@openzeppelin/contracts-upgradeable": "3.4.2",
     "@openzeppelin/hardhat-upgrades": "^1.22.1",
     "@typechain/ethers-v5": "^10.2.1",

packages/contracts/test/package.json

@@ -20,7 +20,7 @@
     "@nomiclabs/hardhat-ethers": "^2.2.3",
     "@nomiclabs/hardhat-etherscan": "^3.1.0",
     "@nomiclabs/hardhat-waffle": "^2.0.6",
-    "@openzeppelin/contracts": "^3.4.1",
+    "@openzeppelin/contracts": "3.4.2",
     "@openzeppelin/contracts-upgradeable": "3.4.2",
     "@openzeppelin/hardhat-upgrades": "^1.22.1",
     "@typechain/ethers-v5": "^10.2.1",

packages/interfaces/package.json

@@ -48,7 +48,7 @@
   },
   "devDependencies": {
     "@nomicfoundation/hardhat-toolbox": "^4.0.0",
-    "@openzeppelin/contracts": "3.4.1",
+    "@openzeppelin/contracts": "3.4.2",
     "@openzeppelin/contracts-upgradeable": "3.4.2",
     "@typechain/ethers-v5": "^10.2.1",
     "@wagmi/cli": "^2.3.1",

packages/token-distribution/package.json

@@ -50,7 +50,7 @@
     "@nomiclabs/hardhat-ethers": "^2.2.3",
     "@nomiclabs/hardhat-etherscan": "^3.1.0",
     "@nomiclabs/hardhat-waffle": "^2.0.6",
-    "@openzeppelin/contracts": "^3.4.1",
+    "@openzeppelin/contracts": "3.4.2",
     "@openzeppelin/contracts-upgradeable": "3.4.2",
     "@openzeppelin/hardhat-upgrades": "^1.22.1",
     "@typechain/ethers-v5": "^10.2.1",