add tester ui, and restructure folders

ctrl/seed.sh

@@ -1,3 +1,8 @@
 #!/usr/bin/env bash
+# Uploads the host's /mnt/documents tree into the in-cluster MinIO. Lives
+# inside the sign_pdfs function folder because it's specific to *this*
+# function's data shape (bucket "my-company-reports-bucket", prefix "2026/04/").
+# Other functions will have their own seed scripts in their own folders.
 set -euo pipefail
-kubectl --context kind-eth -n eth exec -i deploy/lambda -- python seed.py /mnt/documents
+kubectl --context kind-eth -n eth exec -i deploy/lambda -- \
+  python functions/sign_pdfs/seed.py /mnt/documents