Backend changes to support stopping a task mid-way. Uses a custom patch for the stable-diffusion codebase, to make it call a callback for DDIM

scripts/on_sd_start.sh

@@ -18,6 +18,8 @@ if [ -e "scripts/install_status.txt" ] && [ `grep -c sd_git_cloned scripts/insta
     git pull
     git checkout d154155d4c0b43e13ec1f00eb72b7ff9d522fcf9
 
+    git apply ../ui/sd_internal/ddim_callback.patch
+
     cd ..
 else
     printf "\n\nDownloading Stable Diffusion..\n\n"
@@ -32,6 +34,9 @@ else
 
     cd stable-diffusion
     git checkout d154155d4c0b43e13ec1f00eb72b7ff9d522fcf9
+
+    git apply ../ui/sd_internal/ddim_callback.patch
+
     cd ..
 fi