feat: connect sentry to dash and api

apps/api/src/instrument.ts

@@ -0,0 +1,20 @@
+/**
+ * Must be imported as the FIRST thing in `apps/api/src/index.ts`. The Sentry
+ * Node SDK relies on auto-instrumentation that hooks into Node's `require`
+ * resolution and module loaders; any code that runs before this file initializes
+ * Sentry will not be traced.
+ */
+import * as Sentry from '@sentry/node';
+
+const dsn = process.env.SENTRY_DSN?.trim();
+const isProd = process.env.NODE_ENV === 'production';
+const isSelfHosted = process.env.PUBLIC_IS_SELFHOSTED === 'true';
+
+if (dsn && isProd && !isSelfHosted) {
+  Sentry.init({
+    dsn,
+    environment: process.env.SENTRY_ENVIRONMENT?.trim() || 'production',
+    tracesSampleRate: Number(process.env.SENTRY_TRACES_SAMPLE_RATE ?? 0),
+    sendDefaultPii: false
+  });
+}