feat(ci): enforce contract size limits in CI

[jose-compu]

Problem

CI runs forge build --sizes but there is no enforcement of contract size limits. EIP-170 sets the max at 24,576 bytes. We should fail CI if any contract exceeds say 22KB (leaving some headroom).

Approach

• Parse the output of forge build --sizes
• Fail if any contract in src/ exceeds the threshold
• Maybe a small shell script or a custom forge script that checks this
• Could also add contract sizes to the gas snapshot report for visibility

The Diamond contracts in particular can get large so this is worth watching.