chore(release): 2.0.0 — drop -alpha; Void 1 retired, CTs renamed

Void 2 reaches GA. Void 1 (CT 301) was stopped, fully backed up (vzdump +
off-CT data tarball), and destroyed; CT 310/311 renamed void-db/void-app;
the legacy void1 registry tile removed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

CHANGELOG.md

@@ -3,6 +3,12 @@
 All notable changes to Void 2.0 are documented here.
 Format: [Keep a Changelog](https://keepachangelog.com).
 
+## 2.0.0 — General availability (Void 1 retired)
+- **Dropped the `-alpha` tag.** Void 2 is *the* homelab dashboard; `void.hynesy.com` has served it since alpha-18.
+- **Void 1 retired.** CT 301 stopped, backed up (vzdump archive + off-CT data tarball), and destroyed 2026-06-08.
+- **CTs renamed**: `void2-db` / `void2-app` (CT 310 / 311) → `void-db` / `void-app`.
+- **Registry**: removed the legacy `void1` service tile.
+
 ## 2.0.0-alpha.27
 - feat: Timelapse + AI Usage folded into the left rail as an "Apps" section,
   embedded as cross-origin HTTPS iframes; each stays chromeless at its own URL.