hotato 1.15.1

Changed

• hotato prove states its claim scope. The proof envelope gains
  claim_scope (captured_evidence, test_suite, candidate_revision,
  deployed_revision) and evidence_authority, and the renderer headlines the
  scope. A contracts-only run reads Captured Evidence, not a "release
  proof"; a before/after run reaches Candidate Revision only when the caller
  binds the candidate identity with --candidate-config-hash and --provider
  (and --deployment-id for a deployed revision). The proof never claims more
  than its lanes support. No new scoring engine; this is a calibration.
• Corrected three overclaims on the public surfaces. The package
  description drops "everything you use a hosted platform for" (the public
  package has no dataset/prompt management, hosted execution, or team
  collaboration). The product one-liner is a capability, not an automatic
  guarantee. docs/COMPARE.md replaces the caricature of hosted platforms with
  an honest property-by-property table that names where a managed platform is
  the stronger fit.