[tim-thacker-nullify]

Public Actions workflows occupy an office VM, and YAML checks target master while the repository uses main.

• Run every workflow on standard ubuntu-24.04 runners, freeing the office slot after merge.
• Check YAML PRs against main with a pinned linter and all tracked YAML files; remove filename interpolation and the reviewer-assignment job.
• Fetch full tag history before calculating release versions.
• Remove the unused office runner label; fix existing whitespace errors exposed by enabling the check.

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