chore(release): v0.16.0 — BW ACH ingestion

The "BW ACH ingestion" release.  Paired with series3-watcher v1.5.0,
every Blastware ACH event (binary + _ASCII.TXT report) lands in
SeismoDb with device-authoritative peaks, project metadata, sensor
self-check, and ZC/Time-of-Peak data — without depending on the
still-undecoded waveform body codec.

Bumps pyproject.toml + minimateplus/event_file_io.py TOOL_VERSION
to 0.16.0.  README banner + CHANGELOG entry summarise the work
that landed across commits cdfe4ad..f83993a on this branch.

README.md

@@ -1,4 +1,4 @@
-# seismo-relay  `v0.15.0`
+# seismo-relay  `v0.16.0`
 
 A ground-up replacement for **Blastware** — Instantel's aging Windows-only
 software for managing MiniMate Plus seismographs.
@@ -14,11 +14,12 @@ 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.
-> **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.
+> **v0.16.0 (2026-05-11)** adds BW ASCII report ingestion to
+> `/db/import/blastware_file` — paired with **series3-watcher v1.5.0**,
+> every Blastware ACH event lands in SeismoDb with device-authoritative
+> peaks, project metadata, sensor self-check, and ZC/Time-of-Peak data,
+> without depending on the still-undecoded waveform body codec.
+> See [CHANGELOG.md](CHANGELOG.md) for full version history.
 
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