doc: update readme to 0.15.0

README.md

@@ -1,4 +1,4 @@
-# seismo-relay  `v0.14.3`
+# seismo-relay  `v0.15.0`
 
 A ground-up replacement for **Blastware** — Instantel's aging Windows-only
 software for managing MiniMate Plus seismographs.
@@ -14,7 +14,11 @@ over direct RS-232 or cellular modem (Sierra Wireless RV50 / RV55).
 > byte-perfect against Blastware captures across 2-sec, 3-sec, and 10-sec
 > events.** Generated `.G10` / `.AB0` files open cleanly in Blastware with
 > full Event Reports, frequency analysis, and waveform plots.
-> See [CHANGELOG.md](CHANGELOG.md) for full version history.
+> **v0.15.0 (2026-05-07)** adds layered per-event storage (BW binary +
+> raw 5A pickle + HDF5 + `.sfm.json` sidecar), a plot-ready
+> `sfm.plot.v1` JSON shape with server-side ADC-to-physical-units
+> conversion, and a BW-file importer for ingesting externally-produced
+> events.  See [CHANGELOG.md](CHANGELOG.md) for full version history.
 
 ---