feat: unify headless execution under the Standalone Host

Expose an optional private same-uid Unix operator adapter and JSONL serve/attach CLI using the production Standalone Profile, store, restore lease and shutdown lifecycle. Remove direct Worker subprocess/discovery/readiness/controller sockets and parent socket callbacks; retain metadata-only peer registration and legacy safety readers.

Validated real Host/client input, events, provenance, disconnect, admitted shutdown and shared production restore/duplicate exclusion; normal standalone/worker/manifest/protocol/client/yoi/tui/server tests, root check, rustdoc, fmt and state-contract audit. Runtime lib: 476 passed, damaged_checkout_does_not_block_restore_but_is_rejected_when_used fails at missing_git diagnostic; unchanged restore logic, not relaxed or retried. Runtime bins/docs pass.

crates/workspace-server/src/server.rs

@@ -4169,7 +4169,6 @@ impl WorkspaceApi {
                     .with_runtime_request_source(&embedded_identity, embedded_request_audience),
                 )
                 .with_runtime_store_dir(config.embedded_runtime_store_root.clone())
-                .with_controller_transport(worker::WorkerControllerTransport::InProcess)
                 .with_resource_client(Arc::new(resource_broker.clone())),
         )
         .map_err(|err| {

crates/workspace-server/src/server_assignment_attention_tests.rs

@@ -467,7 +467,6 @@ impl AttentionWorkerFactory {
             worker::WorkerBootstrapLayout::RuntimeManagedRun {
                 run_dir: root.join(uuid::Uuid::now_v7().to_string()),
             },
-            worker::WorkerControllerTransport::InProcess,
         )
         .start()
         .await

crates/workspace-server/src/server_assignment_delivery_tests.rs

@@ -800,7 +800,6 @@ impl DeliveryWorkerFactory {
             worker::WorkerBootstrapLayout::RuntimeManagedRun {
                 run_dir: root.join(uuid::Uuid::now_v7().to_string()),
             },
-            worker::WorkerControllerTransport::InProcess,
         )
         .with_model_client(self.client.clone());
         let prepared = if restore {