Freeze independent English German speech and boundary validation inputs

fixtures/speech-validation-v1/README.md

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+# Independent English/German speech preparation v1
+
+No ASR, VAD or Google inference has run on this fixture. The ten topic/absence
+queries and two source recordings were frozen before preparation. The sources
+are human LibriVox readings of Article 1 of the Universal Declaration of Human
+Rights, unrelated to the earlier NASA topics. They share translated content and
+are correlated; this is not a representative multilingual speech benchmark.
+
+| Source | Human reader | Recording permission | Original bytes |
+| --- | --- | --- | ---: |
+| [English Article 1](https://commons.wikimedia.org/wiki/File:Universal_Declaration_of_Human_Rights_-_eng_-_drb_-_Art1.ogg) | David Barnes | LibriVox public-domain dedication / copyrighted free use | 168186 |
+| [German Article 1](https://commons.wikimedia.org/wiki/File:Universal_Declaration_of_Human_Rights_-_ger_-_robu_-_Art1.ogg) | Roman Buettner | LibriVox public-domain dedication / copyrighted free use | 151136 |
+
+The publisher pages explicitly identify the human readers, document and language.
+The primary reference text is [UN Article 1 in English](https://www.un.org/about-us/universal-declaration-of-human-rights)
+and [UNRIC Article 1 in German](https://unric.org/de/allgemeine-erklaerung-menschenrechte/).
+The manifest records reference keywords and topic paraphrases, never model
+captions or recognition-derived ground truth. Full primary text is externally
+linked; it must not be supplied as an ASR prompt or indexed as if recognized.
+
+Only **319322 new bytes** were downloaded. Sources are checked against official
+Commons API size/SHA-1 and acquired SHA-256. The existing independently licensed
+US Navy drum cadence supplies the instrumental control, with its previously
+locked source bytes. Including that reused source, original inputs total
+1893869 bytes. Generated silence is exact zero PCM, released CC0.
+
+## Four-clip pool and honest timestamp scope
+
+Prepared audio is mono 16-kHz s16 WAV. Each human recording remains complete,
+with five seconds of exact leading silence; no reference words are cropped.
+The resulting English/German durations are 22.512 and 16.219 seconds. Music and
+silence controls each cover exactly thirty seconds. Core WAVs total 3159568 bytes.
+The music waveform is the first thirty seconds of the already locked drum source;
+no descriptive tags are used to gate recognition.
+
+Actual source audio stream starts are verified as zero, and the five-second
+padding/PCM source mapping is exact. **The publishers do not provide phrase-level
+timed captions.** Neither the padding boundary nor the whole article bounds prove
+the first phoneme or each sentence's start. Strict utterance-point scoring is
+explicitly unavailable; do not count a start anywhere in the article as precise
+localization success. Independent listening/timed annotations remain required.
+
+Six positive EN/DE queries describe equal dignity/rights, reason/conscience and
+brotherly treatment. Either language's recording is relevant: translated topic
+equivalence is intentional. Four absent queries ask about Mars funding and salary/
+paid leave. Silence and instrumental music remain in every candidate pool, and
+any recognized hallucination remains an explicit measured failure/competitor.
+Per-language recognized concept coverage is separate from semantic file recall.
+
+## Separate seam primitives
+
+`seam-plan.json` freezes two artificial repeat controls, outside the four-clip
+retrieval pool. English source samples repeat twice and German samples three
+times after the same known padding, producing 40.024 and 38.657 seconds. Their
+2517880 additional WAV bytes and exact piecewise source maps stress a 30-second
+window with two-second overlap. These joins are artificial repetitions, not
+natural uninterrupted speech. Do not extrapolate their quality to long talks.
+
+Independent byte checks verified each derived piece equals the original decoded
+source PCM and the prefix is all zeros. Compare full-source VAD on these short
+controls with bounded independent windows, recording interval disagreement,
+source coverage, seam omissions/duplicates and processing cost. Restarted VAD
+need not reproduce a continuously initialized VAD's probabilities. Preserve
+differences rather than changing thresholds or treating an unverified reference
+as infallible. The same labels must not choose gate intervals or discard a seam.
+
+## Preparation and acceptance
+
+```powershell
+python -m unittest discover -s tools/speech-eval -p test_prepare_validation.py
+python tools/speech-eval/prepare_validation.py fixtures/speech-validation-v1/fixture.json .searchi/speech-validation-v1-seams .searchi/media-runtime/bin/ffmpeg.exe .searchi/media-runtime/bin/ffprobe.exe
+```
+
+Preparation already completed; existing files are preserved, so use a fresh
+owned directory for another preparation. Five structural tests passed. Exact
+padding and every seam's source pieces were checked independently without a
+model. No recognition/quality score follows. Hashes are frozen in `inputs.lock.json`:
+
+- Fixture: `e3a850d7a2385e250408f57fe51f4620ce80a20f8625ced42205f02cc46d517d`.
+- Seam plan: `5da4400814c4965fc12a87bb00c36665300730a702a69acd65a72b9f5201ac9e`.
+- Prepared `.searchi/speech-validation-v1-seams/prepared.json`:
+  `085f34f0af863656a28e7a905746973a54d1123bb07053541e09c8af0a58bb3f`.
+
+The earlier four-clip-only plan
+`4635e772834b0eed847459f5f4d47d7c99a591f0adba2c60ce75712557092279`
+is preserved under its original ignored directory and was never inferred.
+
+Before accepted scoring, require every source/window and all ten queries, strict
+UTF-8 and bounded times, zero excluded failed competitors, unchanged worker/model/
+decoder hashes and exact source-byte provenance. Report genuine German recognition
+and all preregistered reference concepts, source-level recall/MRR, absent-return
+rate and gate false positives separately. Both negative controls must retain
+zero accepted recognized speech segments; raw Google audio search stays available.
+Measure decode/VAD/ASR/alignment/Google/storage, cold model load, foreground impact
+and warm reuse separately. ASR remains bounded to thirty seconds even for seam
+controls. Pause between work units for foreground priority; do not claim native
+preemption during one inference call.
+
+This plan does not adopt a provider, change production search or close fine
+timestamp, long-source, accent, representative-noise or human-listening gates.