fix: correct operationParams structure and HTTP 400 for validation errors in Apiary docs

- operationParams is a flat map (workspaceId, objects as JSON string), not nested under params
- validation errors (empty objects list) return HTTP 400, not 422
- restore missing non-branch endpoint section

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: jirkasemmler

apiary.apib

@@ -6041,6 +6041,58 @@ Returns a list of objects (tables and views) present in the workspace schema in
     Returned when the workspace backend is not supported.
 
 
+## Batch Delete Workspace Objects [/v2/storage/workspaces/{workspace_id}/objects/batch-delete]
+
+### Batch Delete Workspace Objects [POST]
+
+Deletes multiple tables and views from a workspace in a single async operation. Returns a job. All objects are attempted even if some fail, but the job will be marked as failed if any deletion fails.
+
++ Parameters
+    + workspace_id (required, number) - Workspace ID
+
++ Request (application/json)
+    + Headers
+
+            X-StorageApi-Token: your_token
+
+    + Body
+
+            {
+                "objects": ["MY_TABLE", "MY_VIEW"]
+            }
+
++ Response 202 (application/json)
+
+    + Body
+
+            {
+                "id": 12345,
+                "status": "waiting",
+                "url": "https://connection.keboola.com/v2/storage/jobs/12345",
+                "operationName": "workspaceBatchDeleteObjects",
+                "operationParams": {
+                    "workspaceId": "456",
+                    "objects": "[\"MY_TABLE\",\"MY_VIEW\"]"
+                },
+                "createdTime": "2013-05-31T16:11:05+0200",
+                "startTime": null,
+                "endTime": null,
+                "runId": null,
+                "results": null,
+                "creatorToken": {
+                    "id": "27978",
+                    "description": "user@keboola.com"
+                }
+            }
+
++ Response 400 (application/json)
+
+    Returned when the request body is invalid (e.g. empty objects list).
+
++ Response 404 (application/json)
+
+    Returned when the workspace is not found.
+
 ## Batch Delete Development Branch Workspace Objects [/v2/storage/branch/{branch_id}/workspaces/{workspace_id}/objects/batch-delete]
 
 ### Batch Delete Development Branch Workspace Objects [POST]
@@ -6072,9 +6124,8 @@ Deletes multiple tables and views from a workspace in a [Development Branch](#re
                 "url": "https://connection.keboola.com/v2/storage/jobs/12345",
                 "operationName": "workspaceBatchDeleteObjects",
                 "operationParams": {
-                    "params": {
-                        "objects": ["MY_TABLE", "MY_VIEW"]
-                    }
+                    "workspaceId": "456",
+                    "objects": "[\"MY_TABLE\",\"MY_VIEW\"]"
                 },
                 "createdTime": "2013-05-31T16:11:05+0200",
                 "startTime": null,
@@ -6087,13 +6138,13 @@ Deletes multiple tables and views from a workspace in a [Development Branch](#re
                 }
             }
 
-+ Response 404 (application/json)
++ Response 400 (application/json)
 
-    Returned when the workspace is not found.
+    Returned when the request body is invalid (e.g. empty objects list).
 
-+ Response 422 (application/json)
++ Response 404 (application/json)
 
-    Returned when the request body is invalid (e.g. empty objects list).
+    Returned when the workspace is not found.
 
 
 ## Data Structures