solc 0.8.31 (#643)

## Description

Bump solidity to 0.8.31 and use `clz` opcode.
Note that at the moment the nightly version of foundry is required to
compile.

## Checklist

- [x] Appropriate PR labels applied
- [x] Test coverage maintained (`just coverage`)
  - [x] No need to add/update tests
  - [ ] Tests are added/updated
- [x] Documentation maintained
  - [ ] No need to update
  - [ ] Updated

Author: madlabman

.foundryref

@@ -1 +1 @@
-v1.4.3
+nightly

.solhint.json

@@ -2,7 +2,7 @@
   "extends": "solhint:recommended",
   "plugins": ["lido-csm"],
   "rules": {
-    "compiler-version": ["error", "0.8.24"],
+    "compiler-version": ["error", "0.8.31"],
     "no-inline-assembly": "off",
     "no-unused-import": "error",
     "func-named-parameters": "error",

foundry.toml

@@ -1,6 +1,6 @@
 [profile.default]
-solc = "0.8.24"
-evm_version = "cancun"
+solc = "0.8.31"
+evm_version = "osaka"
 optimizer = true
 optimizer_runs = 0 # REVISE IN THE FUTURE
 bytecode_hash = "none" # The metadata hash removed from the bytecode (not the metadata itself).

script/DeployBase.s.sol

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2025 Lido <info@lido.fi>
 // SPDX-License-Identifier: GPL-3.0
 
-pragma solidity 0.8.24;
+pragma solidity 0.8.31;
 
 import { Script, VmSafe } from "forge-std/Script.sol";
 

script/DeployHoodi.s.sol

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2025 Lido <info@lido.fi>
 // SPDX-License-Identifier: GPL-3.0
 
-pragma solidity 0.8.24;
+pragma solidity 0.8.31;
 
 import { DeployBase } from "./DeployBase.s.sol";
 import { GIndices } from "./constants/GIndices.sol";

script/DeployImplementationsBase.s.sol

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2025 Lido <info@lido.fi>
 // SPDX-License-Identifier: GPL-3.0
 
-pragma solidity 0.8.24;
+pragma solidity 0.8.31;
 
 import { DeployBase } from "./DeployBase.s.sol";
 import { CSModule } from "../src/CSModule.sol";

script/DeployImplementationsHoodi.s.sol

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2025 Lido <info@lido.fi>
 // SPDX-License-Identifier: GPL-3.0
 
-pragma solidity 0.8.24;
+pragma solidity 0.8.31;
 
 import { DeployImplementationsBase } from "./DeployImplementationsBase.s.sol";
 import { HashConsensus } from "../src/lib/base-oracle/HashConsensus.sol";

script/DeployImplementationsMainnet.s.sol

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2025 Lido <info@lido.fi>
 // SPDX-License-Identifier: GPL-3.0
 
-pragma solidity 0.8.24;
+pragma solidity 0.8.31;
 
 import { DeployImplementationsBase } from "./DeployImplementationsBase.s.sol";
 import { DeployMainnet } from "./DeployMainnet.s.sol";

script/DeployLocalDevNet.s.sol

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2025 Lido <info@lido.fi>
 // SPDX-License-Identifier: GPL-3.0
 
-pragma solidity 0.8.24;
+pragma solidity 0.8.31;
 
 import { DeployBase } from "./DeployBase.s.sol";
 import { GIndices } from "./constants/GIndices.sol";

script/DeployMainnet.s.sol

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: 2025 Lido <info@lido.fi>
 // SPDX-License-Identifier: GPL-3.0
 
-pragma solidity 0.8.24;
+pragma solidity 0.8.31;
 
 import { DeployBase } from "./DeployBase.s.sol";
 import { GIndices } from "./constants/GIndices.sol";