docs(voice): generalize §38 from padding list to omit-needless-words walk

§38 was a wordlist match against named padding ("worth noting", "obviously"). A PR-review comment cleared that list and still ran a third too long on ordinary verbosity the list never names: "is the same change that already merged via" for "landed on", restated subjects, throat-clearing lead-ins. So §38 becomes two passes. The named list runs first, then a real per-sentence sweep whose forcing test is to delete half the sentence and keep only what changes meaning. I renamed "Rhetorical Padding" to "Omit Needless Words" and added a generic-verbosity example pair that carries no padding word. I updated SKILL.md and voice-profile.org together per the pairing rule.

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