chore: 升级 Trellis 并精简规则（09-05-trellis-upgrade-rule-cleanup）

.trellis/tasks/09-05-trellis-upgrade-rule-cleanup/check.jsonl

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+{"_example": "Fill with {\"file\": \"<path>\", \"reason\": \"<why>\"}. Put spec/research files only — no code paths. Run `python3 .trellis/scripts/get_context.py --mode packages` to list available specs. Delete this line once real entries are added."}