[grade=B] DC-103: One-click adopt — auto-generate Caddy route + DNS + service

POST /api/v1/discover/adopt — takes a discovered container and creates:
1. DashCaddy service entry (with subdomain, domain, URL)
2. Caddyfile reverse_proxy route via admin API
3. DNS A record (via configured DNS provider)

Validates containerId, serviceId (subdomain-safe), port, name.
Prevents duplicate service IDs. 1633 tests pass.

dashcaddy-api/src/app.js

@@ -62,6 +62,7 @@ const authRoutes = require('../routes/auth');
 const shareRoutes = require('../routes/share');
 const i18nRoutes = require('../routes/i18n');
 const discoverRoutes = require('../routes/discover');
+const discoverAdoptRoutes = require('../routes/discover-adopt');
 const configRoutes = require('../routes/config');
 const dnsRoutes = require('../routes/dns');
 const notificationRoutes = require('../routes/notifications');
@@ -607,6 +608,16 @@ async function createApp() {
     servicesStateManager: ctx.servicesStateManager,
     asyncHandler: ctx.asyncHandler,
   }));
+
+  // DC-103: One-click adopt — auto-generate routes + DNS + service entry
+  apiRouter.use(discoverAdoptRoutes({
+    docker: ctx.docker,
+    servicesStateManager: ctx.servicesStateManager,
+    caddy: ctx.caddy,
+    dns: ctx.dns,
+    siteConfig: ctx.config,
+    asyncHandler: ctx.asyncHandler,
+  }));
   apiRouter.use(updatesRoutes({
     updateManager: ctx.updateManager,
     selfUpdater: ctx.selfUpdater,