refactor(core): fold initiator scope into agents

scripts/gen-doc-graphs.ts

@@ -156,18 +156,10 @@ const SERVICE_ROLES: ServiceRole[] = [
   {
     key: 'agents',
     pkg: 'agent',
-    title: 'Agent registry',
+    title: 'Agent service',
     mode: 'core',
     consumers: ['agent-loop', 'acp', 'subagent-inprocess', 'stdio-demo', 'invariants'],
-    note: 'Owns live Agent handles and the create/resume factory seam.',
-  },
-  {
-    key: 'agentExecution',
-    pkg: 'agent-execution',
-    title: 'Agent execution context',
-    mode: 'core',
-    consumers: ['agent-loop'],
-    note: 'Carries the exact initiating Agent across one process-local asynchronous driver chain; explicit identities remain authoritative at external boundaries.',
+    note: 'Owns live Agent handles, the create/resume factory seam, and process-local initiator propagation.',
   },
   {
     key: 'agentLoop',