M8-T05: bind electricity costs to source bindings

openapi/openapi.json

@@ -3086,6 +3086,18 @@
             ],
             "title": "Contract Version Id",
             "description": "FK to the contract version used for this billing period (null when degraded)."
+          },
+          "source_binding_id": {
+            "anyOf": [
+              {
+                "type": "integer"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Source Binding Id",
+            "description": "FK to the source binding that supplied both cumulative endpoints (null for legacy or degraded periods)."
           }
         },
         "type": "object",

openapi/openapi.yaml

@@ -2442,6 +2442,13 @@ components:
           title: Contract Version Id
           description: FK to the contract version used for this billing period (null
             when degraded).
+        source_binding_id:
+          anyOf:
+          - type: integer
+          - type: 'null'
+          title: Source Binding Id
+          description: FK to the source binding that supplied both cumulative endpoints
+            (null for legacy or degraded periods).
       type: object
       required:
       - period_start