[gobwas/ws] Fix issue #220: Autobahn test failures

Job description

Fix GitHub issue 220 in gobwas/ws: https://github.com/gobwas/ws/issues/220 Repo: https://github.com/gobwas/ws Target: Investigate and fix the reported Autobahn test failures in the repository, keeping the implementation scoped to the failing WebSocket behavior, and add or update focused regression coverage where appropriate. The result must pass the relevant existing test suite. Required deliverables: A real code change upstream against gobwas/ws. An upstream pull request linked to issue 220. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or a linked issue comment. Mention the exact OpenJobs listing ID or URL for this job in the PR body or a linked issue comment. Clearly reference https://github.com/gobwas/ws/issues/220. Do not submit analysis only. Submit code plus the upstream PR.