v2.1.0: Optional advisory triage clustering

• Skill feedback-triage 1.1 adds a Python 3.9+ helper that compares
  report mechanisms through TypeSafe and suggests clusters. The manual
  workflow remains the default; no service/API or storage changes.
• Disclosure requires explicit approval for each exact repository identity.
  Preview is local; unapproved or unidentified reports are never sent.
  No credential is copied, no queue item is marked, and no report is removed.
• Advice retains source IDs, the digest hash and individual probabilities.
  Groups require agreement for every member pair, not transitive matches.
  Uncertain, unavailable and invalid answers fall back to manual triage;
  bounded requests preserve partial results without dropping reports.