Initial commit of Balout Pastry NestJS API.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/storage/storage-keys.ts

@@ -0,0 +1,36 @@
+/**
+ * Parspack S3 object key layout (path-style public URLs):
+ *
+ *   balout/
+ *     products/main/{uuid}{ext}
+ *     products/gallery/{uuid}{ext}
+ *     categories/{uuid}{ext}
+ *     branches/{uuid}{ext}
+ *     users/{uuid}{ext}
+ *     temp/{uuid}{ext}
+ */
+const ROOT = 'balout';
+
+export function productMainKey(fileName: string): string {
+  return `${ROOT}/products/main/${fileName}`;
+}
+
+export function productGalleryKey(fileName: string): string {
+  return `${ROOT}/products/gallery/${fileName}`;
+}
+
+export function categoryMediaKey(fileName: string): string {
+  return `${ROOT}/categories/${fileName}`;
+}
+
+export function branchMediaKey(fileName: string): string {
+  return `${ROOT}/branches/${fileName}`;
+}
+
+export function userMediaKey(fileName: string): string {
+  return `${ROOT}/users/${fileName}`;
+}
+
+export function tempMediaKey(fileName: string): string {
+  return `${ROOT}/temp/${fileName}`;
+}