fix: prevent out-of-bounds access in bytesToBytes32

[maradini77]

Changes

• Fixed boundary calculation in bytesToBytes32() function
• Added safety check to prevent reading beyond b.length when offset > 0
• Improved robustness of storage slot analysis during test execution

Problem

The previous implementation calculated max without considering the offset parameter:

uint256 max = b.length > 32 ? 32 : b.length; // Ignores offset

This could cause b[offset + i] to access beyond array boundaries, leading to reverts during legitimate test scenarios.