Fix Dependabot vulnerabilities

[Rubilmax]

Summary

• update direct dependencies and root pnpm overrides to patched versions for all current Dependabot advisories
• replace the old Hardhat-based compile path with a shared solc compiler script so the unpatchable Hardhat 2 / elliptic subtree is removed entirely
• pin @velora-dex/sdk to 9.4.2 and avoid the compromised 9.4.1 release

Validation

• pnpm install
• pnpm audit --json
• pnpm --filter @morpho-org/blue-sdk-viem compile
• pnpm --filter @morpho-org/liquidation-sdk-viem compile
• pnpm exec biome check package.json packages//package.json scripts/compile-solidity.js packages/blue-sdk-viem/src/queries/**/.ts packages/liquidation-sdk-viem/test/contracts/SwapMock.ts

Notes

• GitHub still reports the Dependabot alerts on the default branch today; they should clear after this branch is merged and the repo is rescanned.