refactor(qemu): report initramfs progress through the sink

create_initramfs emits Progress events instead of drawing a spinner
inside the library; the cpio walker counts the entries it visits so
the verbose summary no longer reads the count off a progress bar.

crates/ecr-cli/src/main.rs

@@ -73,13 +73,16 @@ fn main() -> Result<()> {
             Some(args.command.clone())
         };
 
-        let result = qemu_vm::launch_qemu(qemu_vm::QemuConfig {
-            kernel_path,
-            rootfs_path: rootfs.dir().to_path_buf(),
-            memory: args.memory.clone(),
-            arch: arch.clone(),
-            command,
-        });
+        let result = qemu_vm::launch_qemu(
+            qemu_vm::QemuConfig {
+                kernel_path,
+                rootfs_path: rootfs.dir().to_path_buf(),
+                memory: args.memory.clone(),
+                arch: arch.clone(),
+                command,
+            },
+            &ecr::NoProgress,
+        );
 
         // Cleanup happens automatically via tempfile
         if result.is_ok() {