feat: professionalize control plane and standalone delivery

src/biliup_next/infra/workspace_cleanup.py

@@ -20,8 +20,13 @@ class WorkspaceCleanupService:
         skipped: list[str] = []
 
         if settings.get("delete_source_video_after_collection_synced", False):
-            source_path = Path(task.source_path)
-            if source_path.exists():
+            source_path = Path(task.source_path).resolve()
+            try:
+                source_path.relative_to(session_dir)
+                source_managed = True
+            except ValueError:
+                source_managed = False
+            if source_path.exists() and source_managed:
                 source_path.unlink()
                 self.repo.delete_artifact_by_path(task_id, str(source_path.resolve()))
                 removed.append(str(source_path))