fix(blastware_file): remove harmful "duplicate header+STRT" strip logic to preserve valid waveform data

CHANGELOG.md

@@ -4,6 +4,28 @@ All notable changes to seismo-relay are documented here.
 
 ---
 
+## v0.14.2 — 2026-05-04
+
+### Fixed
+
+- **`blastware_file.py` — removed harmful "duplicate header+STRT" strip.**
+  The v0.13.x strip logic was matching the byte sequence `00 12 03 00 STRT`
+  in legitimate waveform data — sample chunks at counter `0x1000` and
+  beyond often contain those bytes coincidentally — and zeroing 25 bytes
+  of valid samples per match.  This is why event 0 (event-1 case in the
+  protocol) downloads of >1-sec recordings always failed in BW: the strip
+  destroyed real data at body offset `0x1012..0x102B` and propagated
+  alignment differences through the rest of the body.  Sub-1-sec events
+  worked because their `end_offset` was below `0x1002`, so no sample
+  chunks landed in the metadata-page region and the strip's needle never
+  matched.  Verified fix by re-feeding the BW 5-1-26 "copy 3sec" capture's
+  A5 frames into the file builder: output is now byte-identical to BW's
+  saved `M529LKIQ.G10` reference (8708 bytes, 0 differences).
+- BW already concatenates frame contributions in stream order without
+  any de-duplication; SFM now does the same.
+
+---
+
 ## v0.14.1 — 2026-05-04
 
 ### Fixed