feat: 2.0.0-alpha.11 — DB-backed service registry + LAN auto-discovery

- monitored_services table (mig 015) replaces config/services.json (now a boot seed)
- owner CRUD over /api/health/services; GET is DB-backed; cron+worker read the DB
- discover.lan worker: pure-Node TCP sweep + HTTP-title probe -> disabled 'discovered'
  candidates (never clobbers curated entries); POST /api/health/discover + GET .../discovered
- dashboard: Scan button + Discovered(N) section with one-click promote

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

public/style.css

@@ -324,3 +324,12 @@ body.drawer-open #scrim { opacity: 1; pointer-events: auto; }
 .dv-tile .dv-vendor { font-family: var(--font-ui); font-size: 10px; color: var(--muted); opacity: .7; }
 .dv-tile.flag { border-color: var(--bad); background: #1a1012; }
 .dv-tile.flag .dv-nm { color: var(--bad); }
+
+/* ===== Discovered services + scan (Plan: DB-backed registry) ===== */
+.lb-scan { background: var(--accent-soft); border: 1px solid var(--accent-dim); color: var(--accent);
+  border-radius: 5px; padding: 4px 12px; font-family: var(--font-ui); font-size: 11px; cursor: pointer; flex: none; }
+.lb-scan:hover { background: var(--accent-dim); color: var(--text); }
+.tile.disc { border-style: dashed; }
+.disc-add { margin-left: auto; width: 22px; height: 22px; border-radius: 50%; flex: none;
+  border: 1px solid var(--accent-dim); background: transparent; color: var(--accent); font-size: 14px; line-height: 1; cursor: pointer; }
+.disc-add:hover { background: var(--accent); color: var(--bg); }