[canary] trigger ruff E501 for Phalanx CI-Fixer test

[rnagulapalle]

Intentional canary PR to test whether the Phalanx CI Fixer agent generalizes beyond our own testbed corpus. Single-line E501 violation added to src/humanize/filesize.py:2 (111 > 88). Agent's task: diagnose the lint failure, patch the file, re-run ruff in sandbox, commit.

[rnagulapalle]

I diagnosed the lint failure from the GitHub Actions log and traced it to a single PR-introduced line:

• fetch_ci_log showed ruff check . failing on src/humanize/filesize.py:2:89 with E501 Line too long (111 > 88).
• get_pr_diff showed the only change in this PR is the intentionally long canary comment added on line 2.
• git_blame confirmed that line was introduced by this PR commit.

I prepared the obvious fix locally by removing that comment, which leaves the file header as:

"""Bits and bytes related humanization."""

from __future__ import annotations

However, I did not commit it, because the required sandbox verification could not be completed reliably:

• When I ran the exact failing command in sandbox, ruff check . did not reach the original lint check.
• Instead it failed with an environment/tooling error while parsing pyproject.toml: unknown field 'future-annotations'.

That means I don't have a trusted green verification for the original command in this environment, so I can't safely push a fix under the CI-fixer rules.

How to proceed:

1. Remove the canary comment from src/humanize/filesize.py line 2.
2. Re-run lint in an environment with the repo's expected Ruff version/config support.
3. Re-trigger CI once the tooling mismatch is resolved.

If the sandbox/provisioning issue is corrected, this should be a straightforward one-line fix.