feat: Configurar Dist-Git como Lookaside Cache y corregir bootstrap

- Configurar rol dist_git como Lookaside Cache únicamente (sin git-daemon).
- Actualizar estructura de caché a 'rpms/pkg/file/algo/hash/file' compatible con upstream.
- Añadir scripts bin/sync-sources.bash y bin/sync-all-sources.bash para sincronizar fuentes desde CentOS Stream.
- Eliminar bin/import-srpm.bash obsoleto.
- Actualizar script mxos-get-sources.bash en kojid para usar la nueva estructura de URL.
- Corregir lógica de 'add-host' en koji_bootstrap para manejar reintentos limpiamente.
- Actualizar documentación (README.rst, docs/instalación.rst) reflejando los cambios.
- Correcciones menores en rutas de configuración y nombres de grupos en deploy.yaml.

roles/koji_bootstrap/tasks/add_host.yaml

@@ -10,11 +10,38 @@
       changed_when: "'Host added' in koji_add_host_result.stdout"
       failed_when: "'is already in the database' not in koji_add_host_result.stderr and koji_add_host_result.rc != 0"
   rescue:
-    - name: Convert user to host in DB if it exists as user
+    - name: Get user ID of the non-host user
+      ansible.builtin.command: >
+        sudo -u postgres psql {{ koji_db_name }} -tAc
+        "SELECT id FROM users WHERE name = '{{ item }}' AND usertype = 0;"
+      register: non_host_user_id
+      delegate_to: "{{ koji_db_host }}"
+      changed_when: false
+
+    - name: Delete sessions for non-host user
       ansible.builtin.command: >
         sudo -u postgres psql {{ koji_db_name }} -c
-        "UPDATE users SET usertype = 1 WHERE name = '{{ item }}' AND usertype = 0;"
+        "DELETE FROM sessions WHERE user_id = {{ non_host_user_id.stdout | trim }};"
+      when:
+        - non_host_user_id.stdout | trim | length > 0
+        - "'already exists and it is not a host' in koji_add_host_result.stderr"
+      delegate_to: "{{ koji_db_host }}"
+      changed_when: true
+
+    - name: Delete non-host user
+      ansible.builtin.command: >
+        sudo -u postgres psql {{ koji_db_name }} -c
+        "DELETE FROM users WHERE id = {{ non_host_user_id.stdout | trim }};"
+      when:
+        - non_host_user_id.stdout | trim | length > 0
+        - "'already exists and it is not a host' in koji_add_host_result.stderr"
+      delegate_to: "{{ koji_db_host }}"
+      changed_when: true
+
+    - name: Retry adding Koji builder host
+      ansible.builtin.command: >
+        sudo -u {{ koji_admin_user }} koji
+        --config={{ koji_hub_admin_user_koji_dir }}/config
+        add-host {{ item }} x86_64
       when:
         - "'already exists and it is not a host' in koji_add_host_result.stderr"
-      changed_when: true
-      delegate_to: "{{ koji_db_host }}"