[jeremydmiller]

Bumps version to 9.58.0 and Weasel.* pins to 9.49.0. JasperFx.* pins were already at 2.100.0 on master. Build and source-generator tests pass locally; full CI gates the release.

Fixes #5819

🤖 Generated with Claude Code

[jeremydmiller]

All 30 test jobs pass. The only red check is linting, spell check and build (markdownlint MD049 in docs/configuration/json.md, lines 139, 178, 179, 249). This PR touches no docs, and the same workflow fails identically on master (push runs 2026-11-05 21:30 and 21:34), so it is not caused by this change. The workflow uses markdownlint-cli:latest, so a newer rule is likely the cause. I did not widen the PR to fix it, per the issue's 'nothing else' scope.