Validate gated Google retrieval and record unchanged localization quality

tools/speech-rank/README.md

@@ -19,6 +19,17 @@ ranks are retained; at most the first 100 segment hits per query are exported fo
 the existing scorer. Ties use stable source order. No confidence threshold or
 oracle matching is applied.
 
+The additional frozen `gated-vad-v1` diagnostic policy accepts only the exact
+VAD report SHA-256 `093be2005b57fe16a8f85161cc9da8966e70e2050cf19fa4122531e304dd70df`.
+The ASR report embeds its original UTF-8 bytes and parsed document; both must
+agree. Source probes, decoder hashes and the pinned base Whisper worker must
+match. The ranker independently rebuilds every contiguous window from the frozen
+bounded source-sample intersections, retaining interval identity and explicit
+sub-millisecond tail remainder. Omitted intervals, changed windows or claimed
+no-speech status without frozen empty intervals are rejected before inference.
+All five sources remain explicit competitors; no relevance label selects which
+source receives ASR. Existing ungated reports still require full audio coverage.
+
 ```powershell
 cargo test --manifest-path tools/speech-rank/Cargo.toml --locked
 cargo build --release --manifest-path tools/speech-rank/Cargo.toml --locked