Add comprehensive debugging to identify build failure

- Add debugging output to see what happens during apt source ostree
- Add error handling to catch if apt source fails
- This will help identify where the build is actually failing

.forgejo/workflows/ci.yml

@@ -97,8 +97,28 @@ jobs:
             # Clone ostree from sid
             echo 'Cloning ostree from Debian sid...'
             cd /tmp
-            apt source ostree
+            echo 'Current directory before apt source:'
+            pwd
+            ls -la
+            echo 'Running apt source ostree...'
+            if apt source ostree; then
+              echo 'apt source ostree succeeded'
+            else
+              echo 'apt source ostree failed!'
+              echo 'Checking available packages:'
+              apt search ostree | head -10
+              echo 'Checking sources:'
+              cat /etc/apt/sources.list
+              exit 1
+            fi
+            echo 'After apt source, checking directory:'
+            ls -la
+            echo 'Looking for ostree directory:'
+            ls -la ostree-* || echo 'No ostree directory found'
             cd ostree-*
+            echo 'Changed to ostree directory:'
+            pwd
+            ls -la
 
             # Update changelog for trixie
             echo 'Updating changelog for trixie...'