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      "query": "q055",
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      "detail": "Exact metadata requires production lexical lane; direct audio embeddings cannot verify artist/title identities"
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      "detail": "Exact metadata requires production lexical lane; direct audio embeddings cannot verify artist/title identities"
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      "category": "unsupported-query-capability",
      "detail": "Exact metadata requires production lexical lane; direct audio embeddings cannot verify artist/title identities"
    },
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      "detail": "Exact metadata requires production lexical lane; direct audio embeddings cannot verify artist/title identities"
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  "source_scope": "Direct real-model dense reference baseline; candidate filters here are benchmark reference constraints, not production-filter certification; no rejection threshold is tuned",
  "interpretation": "Small independently labelled public-media diagnostic; source_scope identifies the measured lane. No-answer return rate measures unsuppressed output, not a calibrated confidence policy. Audio interval overlap can pass while the returned start timestamp is too early; point hits expose this. This corpus alone cannot certify production quality."
}