Don't self-build ma1sd every time unless git sources changed

roles/matrix-ma1sd/tasks/setup_install.yml

@@ -87,6 +87,7 @@
     shell: "./gradlew dockerBuild"
     args:
       chdir: "{{ matrix_ma1sd_docker_src_files_path }}"
+    when: "matrix_ma1sd_git_pull_results.changed|bool"
 
   - name: Ensure ma1sd Docker image is tagged correctly
     docker_image:
@@ -97,6 +98,7 @@
       repository: "{{ matrix_ma1sd_docker_image }}"
       force_tag: yes
       source: local
+    when: "matrix_ma1sd_git_pull_results.changed|bool"
   when: "matrix_ma1sd_container_image_self_build|bool"
 
 - name: Ensure ma1sd config installed