release: bump version to 0.9.0

README.md

@@ -4,7 +4,7 @@ Go-based FM stereo transmitter with RDS. Supports ADALM-Pluto (PlutoSDR) and Soa
 
 ## Status
 
-**Current status:** `v0.7.0-pre` — hardware bring-up milestone
+**Current status:** `v0.9.0` — runtime hardening milestone
 
 What is already in place:
 - complete DSP chain: audio -> pre-emphasis -> stereo encoding -> RDS -> MPX -> limiter -> FM modulation
@@ -16,10 +16,10 @@ What is already in place:
 - live audio ingestion via stdin or HTTP stream input
 
 Current engineering focus:
-- deterministic runtime behavior
-- fault handling / recovery
-- observability and runtime telemetry
-- hardware-validated signal quality
+- merge/release stabilization after runtime hardening
+- deferred hardware-in-the-loop / RF validation work
+- deferred device-aware capability / calibration work
+- deferred signal self-monitoring work
 
 For the active runtime-hardening track, see:
 - `docs/pro-runtime-hardening-workboard.md`

docs/README.md

@@ -116,5 +116,5 @@ The HTTP control plane also exposes `GET /dry-run` for quick inspection.
 ## Release posture
 
 Current honest release posture: **pre-v1**.
-Recommended milestone tag: `v0.4.0-pre`.
+Recommended milestone tag: `v0.9.0`.
 See `CHANGELOG.md` and `RELEASE.md`.