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/apt-ostree.postrm

@@ -1,132 +1,66 @@
 #!/bin/sh
-# postrm script for apt-ostree
-#
-# This script is executed after the package is removed.
-# It handles post-removal cleanup tasks such as removing
-# configuration files, cleaning up temporary files, and
-# updating system caches.
-
 set -e
 
-# Package name
+# Source debconf library
+. /usr/share/debconf/confmodule
+
+# Define package name
 PACKAGE="apt-ostree"
 
-# Configuration directories
-CONFIG_DIR="/etc/apt-ostree"
-DATA_DIR="/var/lib/apt-ostree"
-LOG_DIR="/var/log/apt-ostree"
+# Function to log messages
+log() {
+    echo "$PACKAGE: $1" >&2
+}
 
+# Function to cleanup shell completions
+cleanup_completions() {
+    log "Cleaning up shell completions..."
+    
+    # Remove bash completion
+    if [ -f /usr/share/bash-completion/completions/apt-ostree ]; then
+        rm -f /usr/share/bash-completion/completions/apt-ostree
+    fi
+    
+    # Remove zsh completion
+    if [ -f /usr/share/zsh/vendor-completions/_apt-ostree ]; then
+        rm -f /usr/share/zsh/vendor-completions/_apt-ostree
+    fi
+    
+    # Reload bash completion if available (skip if problematic)
+    # if [ -f /etc/bash_completion ]; then
+    #     . /etc/bash_completion
+    # fi
+}
+
+# Function to cleanup man pages
+cleanup_man_pages() {
+    log "Cleaning up man pages..."
+    
+    # Remove man page
+    if [ -f /usr/share/man/man1/apt-ostree.1 ]; then
+        rm -f /usr/share/man/man1/apt-ostree.1
+    fi
+    
+    # Update man page database
+    if command -v mandb >/dev/null 2>&1; then
+        mandb -q || true
+    fi
+}
+
+# Main execution
 case "$1" in
-    remove)
-        echo "Post-removal cleanup for $PACKAGE..."
-        
-        # Remove configuration files
-        if [ -d "$CONFIG_DIR" ]; then
-            echo "Removing configuration directory: $CONFIG_DIR"
-            rm -rf "$CONFIG_DIR"
-        fi
-        
-        # Remove data directory
-        if [ -d "$DATA_DIR" ]; then
-            echo "Removing data directory: $DATA_DIR"
-            rm -rf "$DATA_DIR"
-        fi
-        
-        # Remove log directory
-        if [ -d "$LOG_DIR" ]; then
-            echo "Removing log directory: $LOG_DIR"
-            rm -rf "$LOG_DIR"
-        fi
-        
-        # Remove log rotation configuration
-        if [ -f "/etc/logrotate.d/apt-ostree" ]; then
-            echo "Removing log rotation configuration"
-            rm -f "/etc/logrotate.d/apt-ostree"
-        fi
-        
-        # Remove shell completion files
-        if [ -f "/usr/share/bash-completion/completions/apt-ostree" ]; then
-            echo "Removing bash completion file"
-            rm -f "/usr/share/bash-completion/completions/apt-ostree"
-        fi
-        
-        if [ -f "/usr/share/zsh/vendor-completions/_apt-ostree" ]; then
-            echo "Removing zsh completion file"
-            rm -f "/usr/share/zsh/vendor-completions/_apt-ostree"
-        fi
-        
-        # Update shell completion caches
-        if command -v update-bash-completion >/dev/null 2>&1; then
-            update-bash-completion apt-ostree || true
-        fi
-        
-        # Update man page database
-        if command -v mandb >/dev/null 2>&1; then
-            mandb -q || true
-        fi
-        
-        echo "$PACKAGE post-removal cleanup completed"
+    remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
+        cleanup_completions
+        cleanup_man_pages
         ;;
-        
     purge)
-        echo "Post-purge cleanup for $PACKAGE..."
-        
-        # Remove all remaining files and directories
-        if [ -d "$CONFIG_DIR" ]; then
-            echo "Removing configuration directory: $CONFIG_DIR"
-            rm -rf "$CONFIG_DIR"
-        fi
-        
-        if [ -d "$DATA_DIR" ]; then
-            echo "Removing data directory: $DATA_DIR"
-            rm -rf "$DATA_DIR"
-        fi
-        
-        if [ -d "$LOG_DIR" ]; then
-            echo "Removing log directory: $LOG_DIR"
-            rm -rf "$LOG_DIR"
-        fi
-        
-        # Remove any remaining configuration files
-        if [ -f "/etc/logrotate.d/apt-ostree" ]; then
-            echo "Removing log rotation configuration"
-            rm -f "/etc/logrotate.d/apt-ostree"
-        fi
-        
-        # Remove shell completion files
-        if [ -f "/usr/share/bash-completion/completions/apt-ostree" ]; then
-            echo "Removing bash completion file"
-            rm -f "/usr/share/bash-completion/completions/apt-ostree"
-        fi
-        
-        if [ -f "/usr/share/zsh/vendor-completions/_apt-ostree" ]; then
-            echo "Removing zsh completion file"
-            rm -f "/usr/share/zsh/vendor-completions/_apt-ostree"
-        fi
-        
-        # Update shell completion caches
-        if command -v update-bash-completion >/dev/null 2>&1; then
-            update-bash-completion apt-ostree || true
-        fi
-        
-        # Update man page database
-        if command -v mandb >/dev/null 2>&1; then
-            mandb -q || true
-        fi
-        
-        echo "$PACKAGE post-purge cleanup completed"
+        cleanup_completions
+        cleanup_man_pages
         ;;
-        
-    upgrade|failed-upgrade|abort-install|abort-upgrade|abort-remove|abort-deconfigure)
-        echo "Post-operation cleanup for $PACKAGE..."
-        # Nothing special needed for these operations
-        ;;
-        
     *)
-        echo "postrm called with unknown argument \`$1'" >&2
+        log "Unknown action: $1"
         exit 1
         ;;
 esac
 
-# Exit successfully
 exit 0