feat(argocd): configure git-age filter

argocd/Dockerfile

@@ -5,6 +5,7 @@ FROM ${BASE_IMAGE}
 USER root
 
 ADD https://code.icb4dc0.de/api/packages/prskr/debian/repository.key /etc/apt/trusted.gpg.d/forgejo-prskr.asc
+COPY gitconfig /etc/gitconfig
 
 RUN chmod 644 /etc/apt/trusted.gpg.d/forgejo-prskr.asc && \
     echo "deb https://code.icb4dc0.de/api/packages/prskr/debian bookworm main" > /etc/apt/sources.list.d/forgejo.list && \

argocd/gitconfig

@@ -0,0 +1,10 @@
+[filter "lfs"]
+    process = git-lfs filter-process
+    required = true
+    clean = git-lfs clean -- %f
+    smudge = git-lfs smudge -- %f
+
+[filter "age"]
+    clean = git-age clean -- %f
+    smudge = git-age smudge -- %f
+    required = true