[BUG] CI binary size check logs oversized binaries but still passes

[equationzhao]

Describe the bug
The GitHub Actions binary size checks print a warning when the binary exceeds 10 MB, but they do not fail the job. This means the check cannot protect the size budget even when the limit is exceeded.

To Reproduce

1. Inspect .github/workflows/go.yml.
2. Find the binary size check steps.
3. The condition only prints Binary size exceeds 10MB and does not run exit 1.

Screenshots
Not applicable.

Info (please complete the following information):

• OS: GitHub Actions
• Version: v0.31.2

Additional context
This is related to binary size governance, but it is separate from feature work to reduce the binary size. The CI check should either fail when the limit is exceeded or be renamed as an informational check.