Let a caller filter order lines instead of paging the table

The backend gained productcode, ordernumber and ordernumber__status on the
order-lines list; the spec and the MCP tools now carry them.

The pair that matters is productcode with ordernumber__status: the first says
what is committed on a reference, the second restricts it to orders still open.
Without the second the answer counts every line ever shipped.

Regenerated with k8s-platform/tools/generate-mcp-tools.py, not by hand.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

openapi.yaml

@@ -35,9 +35,27 @@ paths:
           description: ""
     get:
       operationId: list_order_details
-      description: Retrieve a paginated list of all order line items with product and quantity information.
+      description: Retrieve a paginated list of all order line items with product and quantity information. Filter by product code to find what is committed on a reference, and by order status to count only orders still open.
       summary: List all order details
       parameters:
+        - name: productcode
+          required: false
+          in: query
+          description: Only lines for this product reference.
+          schema:
+            type: string
+        - name: ordernumber
+          required: false
+          in: query
+          description: Only lines belonging to this order.
+          schema:
+            type: integer
+        - name: ordernumber__status
+          required: false
+          in: query
+          description: 'Only lines whose order has this status, e.g. In Process, On Hold, Shipped, Cancelled. An order that is Shipped or Cancelled commits no stock.'
+          schema:
+            type: string
         - name: page
           required: false
           in: query