Add tag filter to blogs, portfolios, and videos list APIs.

Storefronts can filter published content by metadata.tags the same way as products; website API docs are updated to match.

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

src/blogs/blogs.service.ts

@@ -502,6 +502,14 @@ export class BlogsService {
             title: { contains: query.title.trim(), mode: 'insensitive' },
           }
         : {}),
+      ...(query.tag?.trim()
+        ? {
+            metadata: {
+              path: ['tags'],
+              array_contains: query.tag.trim(),
+            },
+          }
+        : {}),
     };
   }
 

src/blogs/dto/blog.dto.ts

@@ -39,6 +39,10 @@ export class ListBlogsDto {
   @IsOptional()
   @IsString()
   title?: string;
+
+  @IsOptional()
+  @IsString()
+  tag?: string;
 }
 
 export class ListPublicBlogsDto {
@@ -65,6 +69,10 @@ export class ListPublicBlogsDto {
   @IsOptional()
   @IsString()
   title?: string;
+
+  @IsOptional()
+  @IsString()
+  tag?: string;
 }
 
 export class CreateBlogDto {