Implement query execution, scoped RPC enrichment, live collections, and scaffold integration

proto/quixos/orch.proto

@@ -3,11 +3,14 @@ syntax = "proto3";
 package quixos.orch;
 
 import "camino/api.proto";
+import "camino/schema.proto";
 import "quixos/package.proto";
 import "quixos/refs.proto";
 import "quixos/runtime.proto";
 
 service OrchestratorRuntime {
+  rpc ExecuteQuery(camino.QueryRequest) returns (camino.QueryResponse);
+  rpc WatchQuery(camino.QueryRequest) returns (stream QueryEvent);
   rpc TryConform(TryConformRequest) returns (TryConformResponse);
   rpc InvokeCapability(InvokeCapabilityRequest) returns (InvokeCapabilityResponse);
   rpc EditCapabilityField(EditCapabilityFieldRequest) returns (InvokeCapabilityResponse);
@@ -23,6 +26,16 @@ service OrchestratorRuntime {
   rpc CloseActivation(CloseActivationRequest) returns (CloseActivationResponse);
 }
 
+message QueryEvent {
+  string run_id = 1;
+  uint64 sequence = 2;
+  string kind = 3;
+  camino.QueryResponse snapshot = 4;
+  repeated camino.QueryPathPart path = 5;
+  camino.Value value = 6;
+  string error = 7;
+}
+
 // Exact closed interface lookup; no policy selection or competing conformances.
 message TryConformRequest {
   string object_id = 1;
@@ -110,6 +123,7 @@ message WatchCapabilityEvent {
 message GetWorkspaceRequest {
   // Revision polling must not download the entire interface graph.
   bool include_interface_contracts = 1;
+  bool include_query_contracts = 2;
 }
 message GetWorkspaceResponse {
   string workspace_id = 1;
@@ -123,6 +137,18 @@ message GetWorkspaceResponse {
   // Exact closed interface contracts used by checked presentation consumers.
   string interfaces_json = 7;
   repeated ClassCapability class_capabilities = 8;
+  repeated QueryDescription queries = 9;
+  uint32 active_query_executions = 10;
+}
+message QueryDescription {
+  string id = 1;
+  string name = 2;
+  string package_revision_id = 3;
+  string document = 4;
+  string schema = 5;
+  repeated string source_files = 6;
+  string effects_json = 7;
+  camino.InstalledQuery plan = 8;
 }
 message ClassCapability {
   string conformance_id = 1;