Migrate IP fields in database to dedicated columns (#1869)

proto/headscale/v1/headscale.proto

@@ -123,6 +123,13 @@ service HeadscaleService {
             post: "/api/v1/node/{node_id}/user"
         };
     }
+
+    rpc BackfillNodeIPs(BackfillNodeIPsRequest) returns (BackfillNodeIPsResponse) {
+        option (google.api.http) = {
+            post: "/api/v1/node/backfillips"
+        };
+    }
+
     // --- Node end ---
 
     // --- Route start ---

proto/headscale/v1/node.proto

@@ -126,3 +126,11 @@ message DebugCreateNodeRequest {
 message DebugCreateNodeResponse {
     Node node = 1;
 }
+
+message BackfillNodeIPsRequest {
+    bool confirmed = 1;
+}
+
+message BackfillNodeIPsResponse {
+    repeated string changes = 1;
+}