FEATURE/MEDIUM: config: add configuration version endpoint

Author: amelhusic

build/haproxy_spec.yaml

@@ -10221,4 +10221,22 @@ paths:
         summary: Replace the value corresponding to each id in a map
         tags:
         - Maps
+  /services/haproxy/configuration/version:
+      get:
+        description: Returns configuration version.
+        operationId: getConfigurationVersion
+        parameters:
+        - $ref: '#/parameters/transaction_id'
+        responses:
+          "200":
+            description: Configuration version
+            schema:
+              type: integer
+          "404":
+            $ref: '#/responses/NotFound'
+          default:
+            $ref: '#/responses/DefaultError'
+        summary: Return a configuration version
+        tags:
+        - Configuration
 

haproxy-spec.yaml

@@ -560,3 +560,5 @@ paths:
     $ref: "paths/runtime.yaml#/maps_entries"
   /services/haproxy/runtime/maps_entries/{id}:
     $ref: "paths/runtime.yaml#/maps_entries_one"
+  /services/haproxy/configuration/version:
+    $ref: "paths/configuration.yaml#/version"

paths/configuration.yaml

@@ -3605,3 +3605,21 @@ acls_one:
         $ref: '#/responses/NotFound'
       'default':
         $ref: '#/responses/DefaultError'
+version:
+  get:
+    summary: Return a configuration version
+    description: Returns configuration version.
+    operationId: getConfigurationVersion
+    tags:
+      - Configuration
+    parameters:
+      - $ref: "#/parameters/transaction_id"
+    responses:
+      '200':
+        description: Configuration version
+        schema:
+          type: integer
+      '404':
+        $ref: '#/responses/NotFound'
+      'default':
+        $ref: '#/responses/DefaultError'