Add Sentry source maps and release tracking

- @sentry/vite-plugin uploads source maps during Docker build
- Release tagged with git SHA (SENTRY_RELEASE) on both client and server
- Environment set to production/development for filtering
- CD passes SENTRY_AUTH_TOKEN + SENTRY_RELEASE as Docker build args
- docker-compose passes SENTRY_RELEASE to runtime containers

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/planner/server.ts

@@ -7,6 +7,8 @@ import { setupYjsWebSocket } from "./app/lib/yjs-server.ts";
 
 Sentry.init({
   dsn: "https://5215134cd78d5e6c199e29300b8425af@o4509530546634752.ingest.de.sentry.io/4511102546608208",
+  release: process.env.SENTRY_RELEASE,
+  environment: process.env.NODE_ENV ?? "development",
   tracesSampleRate: 0.1,
   enabled: process.env.NODE_ENV === "production",
 });