Require ELF closure verification when staging Linux speech runtime

docs/LINUX-SPEECH-0.1.6.md

@@ -51,3 +51,16 @@ The running original snapshot does not contain this correction. Its output
 must not be released as corrected evidence. Next: wait for its terminal result,
 inspect the complete ELF closure, then validate a corrected normal runtime
 outside the build tree with `LD_LIBRARY_PATH` unset and forced CPU recognition.
+
+Linux staging now invokes the same ELF closure verification after manifest,
+architecture and CPU/acceleration checks. A valid inventory cannot bypass this
+check; missing `readelf` also fails staging. Six targeted staging tests passed,
+including inspected ELF coverage, failure propagation and Windows independence.
+
+The upcoming real CPU test fixture was prepared from the unchanged verified
+English WAV (source SHA-256
+`0aa1fa97d367d987bfb3bb01d7eca11db77a544552ccb8dc0a78ad74d0b496ea`).
+Exact mono 16-kHz signed PCM16 samples were converted to float32 by division by
+32768, preserving all 360192 samples. PCM SHA-256:
+`56948226ac5a0ad4b70523a856dad0851929c7067957f339e9a5b30fc9b369ce`.
+Fixture preparation succeeded; native recognition has not yet been executed.