refactor(bootstrap): standardize patterns, extract common logic, remove dead code

- Make timezone, locale, and keymap configurable via system_cfg
- Consolidate rhel8/9/10.repo.j2 into single rhel.repo.j2 template
- Extract bootstrap_common_conditional for shared firewall/LUKS/guest packages
- Remove redundant version aliases (fedora40-43, debian10-13, rhel8-10, etc.)
- Simplify bootstrap dispatch from 10 conditional blocks to single mapping
- Merge bootstrap_ubuntu_lts into bootstrap_ubuntu (identical)
- Remove orphaned firstrun.sh.j2 template
- Remove configuration/defaults/main.yml aliases, inline into banner.yml
- Remove unnecessary changed_when: false on set_fact/debug tasks
- Deduplicate hostname variable computation in locales.yml
- Update README with timezone/locale/keymap variable reference

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

roles/configuration/tasks/banner.yml

@@ -1,6 +1,6 @@
 ---
 - name: Configure MOTD
-  when: configuration_motd_enabled | bool
+  when: system_cfg.features.banner.motd | bool
   block:
     - name: Create MOTD file
       ansible.builtin.copy:
@@ -24,7 +24,7 @@
       failed_when: false
 
 - name: Configure sudo banner
-  when: configuration_sudo_banner_enabled | bool
+  when: system_cfg.features.banner.sudo | bool
   block:
     - name: Create sudoers banner directory
       ansible.builtin.file:

roles/configuration/tasks/locales.yml

@@ -6,7 +6,7 @@
 
 - name: Set local timezone
   ansible.builtin.file:
-    src: /usr/share/zoneinfo/Europe/Vienna
+    src: /usr/share/zoneinfo/{{ system_cfg.timezone }}
     dest: /mnt/etc/localtime
     state: link
     force: true
@@ -20,7 +20,7 @@
         regexp: "{{ item.regex }}"
         line: "{{ item.line }}"
       loop:
-        - { regex: en_US\.UTF-8 UTF-8, line: en_US.UTF-8 UTF-8 }
+        - { regex: "{{ system_cfg.locale }} UTF-8", line: "{{ system_cfg.locale }} UTF-8" }
 
     - name: Generate locales
       when: not is_rhel | bool
@@ -29,19 +29,22 @@
       changed_when: configuration_locale_result.rc == 0
 
 
-    - name: Set hostname
-      vars:
-        configuration_dns_domain: "{{ (system_cfg.network.dns.search | default([]) | first | default('')) | string }}"
+    - name: Compute hostname variables
+      ansible.builtin.set_fact:
+        configuration_dns_domain: >-
+          {{ (system_cfg.network.dns.search | default([]) | first | default('')) | string }}
         configuration_hostname_fqdn: >-
           {{
             hostname
             if '.' in hostname
             else (
-              hostname + '.' + configuration_dns_domain
-              if configuration_dns_domain | length > 0
+              hostname + '.' + (system_cfg.network.dns.search | default([]) | first | default('') | string)
+              if (system_cfg.network.dns.search | default([]) | first | default('') | string) | length > 0
               else hostname
             )
           }}
+
+    - name: Set hostname
       ansible.builtin.copy:
         content: "{{ configuration_hostname_fqdn }}"
         dest: /mnt/etc/hostname
@@ -49,17 +52,6 @@
 
     - name: Add host entry to /etc/hosts
       vars:
-        configuration_dns_domain: "{{ (system_cfg.network.dns.search | default([]) | first | default('')) | string }}"
-        configuration_hostname_fqdn: >-
-          {{
-            hostname
-            if '.' in hostname
-            else (
-              hostname + '.' + configuration_dns_domain
-              if configuration_dns_domain | length > 0
-              else hostname
-            )
-          }}
         configuration_hostname_short: "{{ hostname.split('.')[0] }}"
         configuration_hostname_entries: >-
           {{ [configuration_hostname_fqdn, configuration_hostname_short] | unique | join(' ') }}
@@ -78,13 +70,13 @@
 
     - name: Create vconsole.conf
       ansible.builtin.copy:
-        content: KEYMAP=us
+        content: "KEYMAP={{ system_cfg.keymap }}"
         dest: /mnt/etc/vconsole.conf
         mode: "0644"
 
     - name: Create locale.conf
       ansible.builtin.copy:
-        content: LANG=en_US.UTF-8
+        content: "LANG={{ system_cfg.locale }}"
         dest: /mnt/etc/locale.conf
         mode: "0644"