Release v1.29.2

Shout-out to @ckbaum for contributing a major improvement to File Flattening.

IMPROVEMENTS

• feat: Don't combine two batches if they share any trace numbers.
• feat: Make an effort to preserve original batch ordering.
• feat: expose named errors (and ask for bug reports) from FlattenFile

BUILD

• build: tighten up GITHUB_TOKEN permissions
• build: Apply security best practices from StepSecurity
• build(deps): bump ossf/scorecard-action from 2.0.6 to 2.1.2
• chore(deps): update dependency tzinfo to "~> 2.0"
• fix(deps): update module github.com/juju/ansiterm to v1