feat(server): space avatars and full member profiles in the structure response

contracts/api.schemas.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://json-schema.org/draft/2020-12/schema",
-  "x-backend-contract-sha256": "4e07231f729947308afe7da4fda9441ef0de27552771d85ad0586f06cdad0200",
+  "x-backend-contract-sha256": "a7ea3b6455a14ed68504e9683a38fae13e560bd48df12f3ecf3e82a88f0b83dd",
   "$defs": {
     "AccountChannelBody": {
       "type": "object",
@@ -294,6 +294,16 @@
     "ChannelInfo": {
       "type": "object",
       "properties": {
+        "avatar": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
         "can_manage_structure": {
           "type": "boolean"
         },
@@ -411,6 +421,16 @@
     "ChannelSettingsPatch": {
       "type": "object",
       "properties": {
+        "avatar": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
         "delete_policy": {
           "anyOf": [
             {