feat(identity): expose live maintenance capabilities and transaction authorization

contracts/openapi/platform.v1.json

@@ -1,6 +1,30 @@
 {
   "components": {
     "schemas": {
+      "AccountCapabilities": {
+        "additionalProperties": false,
+        "properties": {
+          "authorization_version": {
+            "default": "1",
+            "pattern": "^[1-9][0-9]{0,18}$",
+            "title": "Authorization Version",
+            "type": "string"
+          },
+          "problem_maintenance": {
+            "default": false,
+            "title": "Problem Maintenance",
+            "type": "boolean"
+          },
+          "schema_version": {
+            "const": 1,
+            "default": 1,
+            "title": "Schema Version",
+            "type": "integer"
+          }
+        },
+        "title": "AccountCapabilities",
+        "type": "object"
+      },
       "ArtifactReference": {
         "additionalProperties": false,
         "properties": {
@@ -98,6 +122,9 @@
       "CurrentUser": {
         "additionalProperties": false,
         "properties": {
+          "capabilities": {
+            "$ref": "#/components/schemas/AccountCapabilities"
+          },
           "id": {
             "format": "uuid",
             "title": "Id",