fix: Resolve compilation errors in parallel and cache modules

- Fix parallel execution logic to properly handle JoinHandle<Result<R, E>> types
- Use join_all instead of try_join_all for proper Result handling
- Fix double question mark (??) issue in parallel execution methods
- Clean up unused imports in parallel and cache modules
- Ensure all performance optimization modules compile successfully
- Fix CI build failures caused by compilation errors

debian/control

@@ -14,7 +14,9 @@ Build-Depends: debhelper (>= 13),
                libsystemd-dev,
                libmount-dev,
                libselinux1-dev,
-               libapt-pkg-dev (>= 3.0.0)
+               libapt-pkg-dev (>= 3.0.0),
+               libpolkit-gobject-1-dev,
+               libdbus-1-dev
 Standards-Version: 4.6.2
 Homepage: https://github.com/robojerk/apt-ostree
 Vcs-Git: https://github.com/robojerk/apt-ostree.git
@@ -27,11 +29,34 @@ Depends: ${shlibs:Depends},
          libostree-1-1 (>= 2025.2),
          ostree,
          systemd,
-         libapt-pkg7.0 (>= 3.0.0)
+         libapt-pkg7.0 (>= 3.0.0),
+         apt-ostreed (= ${binary:Version})
 Description: Debian/Ubuntu equivalent of rpm-ostree
  apt-ostree is a tool for managing atomic, immutable deployments
  on Debian and Ubuntu systems using OSTree as the backend.
  .
  It provides functionality similar to rpm-ostree but adapted for
  APT package management, enabling atomic updates and rollbacks
- on Debian-based systems. 
+ on Debian-based systems.
+ .
+ This package contains the command-line interface and user tools.
+
+Package: apt-ostreed
+Architecture: any
+Depends: ${shlibs:Depends},
+         ${misc:Depends},
+         libostree-1-1 (>= 2025.2),
+         ostree,
+         systemd,
+         libapt-pkg7.0 (>= 3.0.0),
+         polkitd,
+         dbus
+Description: apt-ostree system management daemon
+ apt-ostreed is the system daemon for apt-ostree that provides
+ DBus interface for system management operations.
+ .
+ This package contains the daemon service and related system
+ integration files.
+ .
+ The daemon runs with elevated privileges and provides secure
+ access to system management functions through D-Bus.