Prepare text search during media setup and retain query sessions through promotion

apps/desktop/src-tauri/src/model_download.rs

@@ -2,6 +2,13 @@
 pub use searchi_assets::TOTAL_BYTES;
 use std::{path::Path, sync::atomic::AtomicU64};
 
-pub fn provision(directory: &Path, progress: &AtomicU64) -> Result<(), String> {
-    searchi_assets::provision(directory, progress).map_err(|error| format!("{error:#}"))
+/// Notify only after a pinned asset is byte-verified; download continues while
+/// desktop orchestration prepares a separately owned query session.
+pub fn provision_with_verified_assets(
+    directory: &Path,
+    progress: &AtomicU64,
+    callback: impl FnMut(searchi_assets::VerifiedAsset),
+) -> Result<(), String> {
+    searchi_assets::provision_with_verified_assets(directory, progress, callback)
+        .map_err(|error| format!("{error:#}"))
 }