docs(COMPATIBILITY): mark at/haveged/mod_maxminddb/qemu_guest_agent on Debian and Ubuntu

Mark the four roles as `(x)` (untested but expected to work after
code review) on Debian 12 / 13 and Ubuntu 22.04 / 24.04 / 26.04.
mod_maxminddb follows the role's recent Debian/Ubuntu refactor; the
other three only call package + service modules with no OS-specific
paths or templates.

The Ubuntu 26.04 column and the `(x)` marker convention were
introduced in b4ab8b7.

Author: markuslf

CHANGELOG.md

@@ -58,6 +58,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+* **COMPATIBILITY**: `at`, `haveged`, `mod_maxminddb` and `qemu_guest_agent` are now expected to work on Debian 12 / 13 and Ubuntu 22.04 / 24.04 / 26.04 (marked `(x)`: code-reviewed, untested in production).
 * **role:apps**: Document that the role uses `ansible.builtin.package` internally, so `state: 'latest'` works on backends that support it.
 * **role:cloud_init**: README now lists all cleanup actions (`cloud-init` package removal, `/etc/NetworkManager/conf.d/99-cloud-init.conf`, `/etc/cloud/cloud.cfg.rpmsave`).
 * **role:dnf_versionlock**: README explains the RHEL 7 vs RHEL 8+ backend differences (`yum-plugin-versionlock` vs `dnf-command(versionlock)` and the corresponding lock-list paths).

COMPATIBILITY.md

@@ -14,7 +14,7 @@ apache_httpd                         | x  | x  | x | x | x  |  (x)  |   x   |  (
 apache_solr                          |    |    | x | x |(x) |       |       |       |
 apache_tomcat                        |    |    | x | x |(x) |       |       |       |
 apps                                 |(x) |(x) | x | x | x  |  (x)  |  (x)  |  (x)  |
-at                                   |    |    | x | x |(x) |       |       |       | Fedora 35
+at                                   |(x) |(x) | x | x |(x) |  (x)  |  (x)  |  (x)  | Fedora 35
 audit                                |    |    | x | x |(x) |       |       |       |
 bind                                 |    |    | x | x | x  |       |       |       |
 blocky                               |    |    | x | x |(x) |       |       |       |
@@ -50,7 +50,7 @@ grafana_grizzly                      |(x) |(x) | x | x |(x) |  (x)  |  (x)  |  (
 grav                                 |    |    | x |(x)|(x) |       |       |       |
 graylog_datanode                     | x  | x  | x | x |(x) |  (x)  |  (x)  |  (x)  |
 graylog_server                       | x  | x  | x |(x)|(x) |  (x)  |  (x)  |  (x)  |
-haveged                              |    |    | x | x |(x) |       |       |       |
+haveged                              |(x) |(x) | x | x |(x) |  (x)  |  (x)  |  (x)  |
 hetzner_vm                           |    |    |   |   |    |       |       |       | Fedora 35+
 hostname                             |(x) |(x) | x | x |(x) |  (x)  |  (x)  |  (x)  |
 icinga2_agent                        |(x) | x  | x | x |(x) |  (x)  |  (x)  |  (x)  | Fedora 35
@@ -102,7 +102,7 @@ mastodon                             |(x) |(x) |(x)| x |(x) |  (x)  |  (x)  |  (
 maxmind_geoip                        |(x) |(x) | x |(x)|(x) |  (x)  |  (x)  |  (x)  |
 minio_client                         |(x) |(x) | x |(x)|(x) |  (x)  |  (x)  |  (x)  |
 mirror                               |    |    | x | x |(x) |       |       |       |
-mod_maxminddb                        |    |    | x |(x)|(x) |       |       |       |
+mod_maxminddb                        |(x) |(x) | x |(x)|(x) |  (x)  |  (x)  |  (x)  |
 mongodb                              | x  | x  | x | x |(x) |  (x)  |  (x)  |  (x)  |
 monitoring_plugins                   |(x) |(x) | x | x |(x) |  (x)  |  (x)  |  (x)  | Debian 9, Fedora, Suse, Windows
 monitoring_plugins_grafana_dashboards|(x) |(x) | x | x |(x) |  (x)  |  (x)  |  (x)  |
@@ -130,7 +130,7 @@ Role                                 | 12 | 13 | 8 | 9 | 10 | 22.04 | 24.04 | 26
 proxysql                             |    |    | x |(x)|(x) |       |       |       |
 python                               | x  | x  | x | x |(x) |  (x)  |  (x)  |  (x)  | Windows
 python_venv                          | x  | x  | x | x |(x) |  (x)  |  (x)  |  (x)  | Fedora 35
-qemu_guest_agent                     |    |    | x | x | x  |       |       |       |
+qemu_guest_agent                     |(x) |(x) | x | x | x  |  (x)  |  (x)  |  (x)  |
 redis                                | x  | x  | x | x |(x) |  (x)  |  (x)  |  (x)  |
 repo_baseos                          |    |    | x | x | x  |       |       |       |
 repo_collabora                       |    |    | x |(x)|(x) |       |       |       |