feat: monitoring + logging with sentry and pino

src/lib/server/db/index.ts

@@ -2,11 +2,47 @@ import * as schema from './schema';
 import { building } from '$app/environment';
 import { drizzle } from 'drizzle-orm/bun-sql';
 import { env } from '$env/dynamic/private';
+import { log } from '$lib/server/logger';
+import { metrics } from '$lib/server/metrics';
+
+const SLOW_QUERY_THRESHOLD_MS = 100;
 
 function createDb() {
 	if (building) return null!;
 	if (!env.DATABASE_URL) throw new Error('DATABASE_URL is not set');
-	return drizzle(env.DATABASE_URL, { schema });
+	return drizzle(env.DATABASE_URL, {
+		schema,
+		logger: {
+			logQuery(query: string, params: unknown[]) {
+				log.db.debug({ query: query.slice(0, 300) }, 'Query');
+			}
+		}
+	});
 }
 
 export const db = createDb();
+
+/**
+ * Wraps a database operation with timing. Logs slow queries (>100ms)
+ * and updates metrics counters.
+ *
+ * Usage:
+ *   const users = await timedQuery('getUsers', () => db.query.user.findMany());
+ */
+export async function timedQuery<T>(label: string, fn: () => Promise<T>): Promise<T> {
+	const start = performance.now();
+	try {
+		const result = await fn();
+		const duration = Math.round(performance.now() - start);
+		metrics.totalQueries++;
+		metrics.totalQueryTime += duration;
+		if (duration > SLOW_QUERY_THRESHOLD_MS) {
+			log.db.warn({ label, duration }, 'Slow query');
+			metrics.slowQueries++;
+		}
+		return result;
+	} catch (err) {
+		log.db.error({ err, label }, 'Query failed');
+		throw err;
+	}
+}