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/app/entry.client.tsx

@@ -6,6 +6,7 @@ import { HydratedRouter } from "react-router/dom";
 Sentry.init({
   dsn: "https://5215134cd78d5e6c199e29300b8425af@o4509530546634752.ingest.de.sentry.io/4511102546608208",
   integrations: [Sentry.browserTracingIntegration(), Sentry.replayIntegration()],
+  environment: import.meta.env.PROD ? "production" : "development",
   tracesSampleRate: 0.1,
   replaysSessionSampleRate: 0,
   replaysOnErrorSampleRate: 1.0,