feat: 添加媒体资源软删除API接口及相关文档

backend/docs/swagger.yaml

@@ -2002,6 +2002,31 @@ paths:
       tags:
       - Tenant
   /t/{tenantCode}/v1/admin/media_assets/{assetID}:
+    delete:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: AssetID
+        format: int64
+        in: path
+        name: assetID
+        required: true
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/models.MediaAsset'
+      summary: 删除媒体资源（租户管理，软删）
+      tags:
+      - Tenant
     get:
       consumes:
       - application/json