Bootstrap copied BFF and local accounts with public Sendico contracts (#34)

backend/contracts/sendico/api/payments/documents_certificate.yaml

@@ -0,0 +1,47 @@
+get:
+  tags: [Payments]
+  summary: Download payment certificate
+  description: |
+    Returns a generated payment certificate as binary content.
+    The payment must be settled; the BFF resolves certificate details from the payment reference.
+  operationId: paymentsGetPaymentCertificate
+  security:
+    - bearerAuth: []
+  parameters:
+    - $ref: ../parameters/organizations_ref.yaml#/components/parameters/OrganizationsRef
+    - name: payment_ref
+      in: query
+      required: true
+      description: Settled payment reference used to generate the payment certificate.
+      schema:
+        type: string
+  responses:
+    '200':
+      description: Payment certificate file
+      content:
+        application/pdf:
+          schema:
+            type: string
+            format: binary
+        application/octet-stream:
+          schema:
+            type: string
+            format: binary
+    '400':
+      $ref: ../response/operation.yaml#/components/responses/BadRequest
+    '401':
+      $ref: ../response/operation.yaml#/components/responses/Unauthorized
+    '403':
+      $ref: ../response/operation.yaml#/components/responses/Forbidden
+    '404':
+      $ref: ../response/operation.yaml#/components/responses/NotFound
+    '409':
+      $ref: ../response/operation.yaml#/components/responses/Conflict
+    '500':
+      $ref: ../response/operation.yaml#/components/responses/InternalServerError
+    '503':
+      description: Upstream service unavailable
+      content:
+        application/json:
+          schema:
+            $ref: ../response/response.yaml#/components/schemas/ErrorResponse