Fix workflow-dispatched test runs

[coisa]

Summary

• treat max-outdated as a string workflow input so manual dispatch validation does not fail before jobs are created
• stop passing explicit max-outdated=-1 from release, wiki, and conflict automation dispatches, relying on the tests workflow default instead
• keep packaged consumer test wrappers aligned with the reusable workflow input contract
• teach pull-request publication guidance to read back the published body and fix literal escaped Markdown control characters before handoff

Verification

• actionlint .github/workflows/tests.yml resources/github-actions/tests.yml .github/workflows/changelog.yml .github/workflows/wiki-preview.yml
• ruby -e 'require "yaml"; ARGV.each { |file| YAML.load_file(file); puts file }' .github/workflows/tests.yml resources/github-actions/tests.yml .github/workflows/changelog.yml .github/workflows/wiki-preview.yml
• composer dev-tools changelog:check
• git diff --check
• GrumPHP pre-commit hook
• gh workflow run tests.yml --repo php-fast-forward/dev-tools --ref fix/tests-workflow-dispatch-inputs -f publish-required-statuses=true -> run 24915679472 completed successfully with matrix jobs and required status publication

Follow-up from #250.

[github-actions]

🚀 Preview is available for this pull request.

• Docs: https://php-fast-forward.github.io/dev-tools/previews/pr-258/
• Coverage: https://php-fast-forward.github.io/dev-tools/previews/pr-258/coverage/
• Metrics: https://php-fast-forward.github.io/dev-tools/previews/pr-258/metrics/