Add Camino edge materialization protocol

proto/camino/api.proto

@@ -14,6 +14,7 @@ service CaminoService {
   rpc SetField(SetFieldRequest) returns (SetFieldResponse);
   rpc AddEdge(AddEdgeRequest) returns (AddEdgeResponse);
   rpc ListEdges(ListEdgesRequest) returns (ListEdgesResponse);
+  rpc ResolveEdge(ResolveEdgeRequest) returns (ResolveEdgeResponse);
   rpc RemoveEdge(RemoveEdgeRequest) returns (RemoveEdgeResponse);
   rpc ListOps(ListOpsRequest) returns (ListOpsResponse);
   rpc WatchObject(WatchObjectRequest) returns (stream WatchObjectEvent);
@@ -145,6 +146,17 @@ message ListEdgesResponse {
   repeated CaminoEdge edges = 1;
 }
 
+message ResolveEdgeRequest {
+  string object_id = 1;
+  string projection = 2;
+}
+
+message ResolveEdgeResponse {
+  repeated CaminoEdge edges = 1;
+  CaminoObject materialized_object = 2;
+  bool created = 3;
+}
+
 message RemoveEdgeRequest {
   string edge_id = 1;
 }

proto/camino/options.proto

@@ -73,6 +73,12 @@ message EdgeEndpointOptions {
   string projection = 3;
   Cardinality cardinality = 4;
   bool indexed = 5;
+  EdgeMaterializationOptions materialize = 6;
+}
+
+message EdgeMaterializationOptions {
+  SymbolRef class = 1;
+  string connect_projection = 2;
 }
 
 message MethodOptions {

proto/camino/schema.proto

@@ -169,6 +169,12 @@ message EdgeEndpointSchema {
   string projection = 3;
   Cardinality cardinality = 4;
   bool indexed = 5;
+  EdgeMaterialization materialize = 6;
+}
+
+message EdgeMaterialization {
+  SymbolRef class = 1;
+  string connect_projection = 2;
 }
 
 message MethodSchema {