deb: drive build_binary_package through the BuildView port

The binary build joins the source build on the reporting ports:
build_binary_package takes a DebBuildOptions struct (replacing eleven
positional arguments), reports target, phases, progress and the
outcome through the environment-agnostic BuildView, and the Phase enum
with its default classifiers moves from the terminal widget into the
deb module (announced through the enter_phase helper). DebUi loses its
inherent event methods and only implements the port; tee logging and
the SIGINT behavior are unchanged.

No behavior change for the CLI; headless consumers pass report::Quiet.

src/new/questions.rs

@@ -624,20 +624,13 @@ pub async fn offer_verification(
         return;
     }
 
-    let ui = Some(std::sync::Arc::new(crate::ui::deb::DebUi::new(multi)));
-    if let Err(e) = crate::deb::build_binary_package(
-        None,
-        Some(&opts.series),
-        None,
-        Some(&tree),
-        false,
-        None,
-        None,
-        None,
-        None,
-        ui,
-        None,
-    )
+    let view = crate::ui::deb::DebUi::new(multi);
+    if let Err(e) = crate::deb::build_binary_package(crate::deb::DebBuildOptions {
+        series: Some(opts.series.clone()),
+        cwd: Some(tree.clone()),
+        view: &view,
+        ..Default::default()
+    })
     .await
     {
         log::error!("Verification binary build failed: {e}");