feat: deploy Caddy repository server for BaseOS packages

- Provision cs10-repo.mx-os VM with 500 GB system disk using OpenTofu.
- Create and apply Ansible role to install and configure Caddy to serve /srv/repo/.
- Update Koji Hub export script to rsync signed binary RPMs to the repo server and trigger createrepo_c.
- Record ADR-05 detailing this design decision and update package compilation guide.
- Log progress in the project journal.

Co-developed-by: Gemini AI <renich+gemini@woralelandia.com>
Signed-off-by: Rénich Bon Ćirić <renich@woralelandia.com>

roles/caddy/handlers/main.yaml

@@ -0,0 +1,5 @@
+---
+- name: Restart caddy
+  ansible.builtin.systemd:
+    name: caddy
+    state: restarted