chore: drop the stale zizmor --no-progress workaround

[ewjoachim]

The zizmor hook carries --no-progress, pointing at
zizmorcore/zizmor#582. That
issue is closed as completed (2025-03-11), and the flag no longer earns its
place here.

Evidence

The issue is resolved. #582 turned out not to be a zizmor bug at all: zizmor
already suppressed the TUI on a non-tty, and the reporter's progress bar came
from pre-commit.ci presenting itself as a tty. The --no-progress escape
hatch was re-added in #589 and
shipped in v1.5.0, for that kind of tty-faking runner.

The pinned version postdates the fix. uv.lock pins zizmor==1.29.0
(2026-08-01), far past v1.5.0 (2025-03-11).

Non-tty output was checked. Running the hook the way make lint and CI do,
with output captured rather than on a terminal, yields no progress bar — zero
carriage returns, zero erase-line sequences, zero bar glyphs:

$ uv run prek run zizmor --color=always --all-files --verbose > out.txt 2>&1
$ python3 -c "d=open('out.txt','rb').read(); print('CR:', d.count(b'\r'), 'ESC[2K:', d.count(b'\x1b[2K'))"
CR: 0 ESC[2K: 0

zizmor...................................................................Passed
- hook id: zizmor
- duration: 0.12s

   INFO zizmor: 🌈 zizmor v1.29.0
   WARN audit: zizmor: zizmor is running in offline mode by default; ...
   INFO audit: zizmor: 🌈 completed .github/workflows/autofix.yml
   ...
  No findings to report. Good job! (10 ignored)
  No fixes available to apply.

Worth noting --color=always does not reintroduce the problem: prek forces
colour through the environment rather than by allocating a pty, so the log lines
come out coloured while the progress bar stays suppressed. Attaching prek itself
to a real pty behaves the same — the only carriage returns belong to prek's own
"Running hooks..." spinner. For contrast, giving zizmor a genuine pty
(script -q out.txt uv run zizmor ...) does produce the full TUI — 338 carriage
returns, 327 erase-line sequences — so this is about the hook's environment, not
about zizmor having dropped the feature.

uv run prek run --show-diff-on-failure --color=always --all-files passes, all
eleven hooks green.

Checklist:

• Tests
  • (not applicable?)
• Documentation
  • (not applicable?)

🤖 Generated with Claude Code

[github-actions]

Coverage report

This PR does not seem to contain any modification to coverable code.