fix: normalize Windows backslashes to forward slashes in cron bash script paths (#60857)

[kyssta-exe]

On Windows, MSYS2/Git Bash interprets backslashes as escape sequences, not path separators. Convert backslashes to POSIX forward slashes before passing the script path to bash.

[alt-glitch]

This was generated by AI during triage.
Duplicate of #23405 — same POSIX-path conversion at the same code site (cron/scheduler.py::_run_job_script), fixing the Windows/Git-Bash backslash-mangling of .sh script paths. #23405 (open, 2026-05-10) is the earliest of the cluster; #44350 and #46364 are the same family. Also relates to the spec issue #60857. The fix is genuinely still needed (main still passes str(path) unconverted) — a maintainer should pick the canonical PR from this cluster.

[tonydwb]

Code Review Summary

Verdict: Comment (token read-only)

PR 60892 normalizes Windows backslashes to forward slashes in cron bash script paths. Small fix (1 file, 5 additions, 1 deletion) for cross-platform compatibility.

LGTM - awaiting maintainer approval.

[teknium1]

Thanks for targeting a real native-Windows cron failure: current main still passes str(path) to Bash at cron/scheduler.py:2091, matching the reports in #60857 and #23404.

Problems

• cron/scheduler.py:2094 in this PR uses str(path).replace("\\", "/") for every host. That rewrites literal backslashes in valid POSIX filenames, so it can change a validated script path into a different path on Linux/macOS. path.as_posix() performs the intended Windows conversion without that POSIX behavior change.

Suggested changes

• Replace the blanket string replacement with path.as_posix() for the Bash argv element.
• Add a focused regression assertion with PureWindowsPath; the existing shell-script test at tests/cron/test_cron_no_agent.py:288 does not cover Windows serialization. Closed PR #43076 contains a minimal example of that test shape.

Automated hermes-sweeper review.

[teknium1]

Please use path.as_posix() here rather than replacing backslashes unconditionally. On POSIX, \ is a valid filename character, so this replacement can turn a validated script path into a different path; as_posix() still converts native Windows paths as required.

[kyssta-exe]

Stale — no merge activity for 4-6 days. Can resubmit if still needed.