Fix: S3 key encoding env quote stripping test assertions remove unused import

dist-server/s3Source.js

@@ -85,9 +85,11 @@ class S3Source {
      * Download an object's content as string
      */
     async getObject(key) {
+        // Encode each path segment separately to preserve /
+        const encodedKey = key.split('/').map(s => encodeURIComponent(s)).join('/');
         const path = this.config.endpoint
-            ? `/${this.config.bucket}/${encodeURIComponent(key)}`
-            : `/${encodeURIComponent(key)}`;
+            ? `/${this.config.bucket}/${encodedKey}`
+            : `/${encodedKey}`;
         const response = await this.requestRaw('GET', path, '');
         // Auto-decompress if gzipped
         if (key.endsWith('.gz') || key.endsWith('.gzip')) {