docs(content): correct the family default to rhel=dvd, not EL=dvd

README.md

@@ -183,7 +183,7 @@ Top-level variables outside `system`/`hypervisor`.
 
 #### `system.content`
 
-Uniform package content source, family-resolved. `source: ''` defaults to `dvd` on EL and `mirror` on Debian/Ubuntu/Arch. Satellite values come from inventory/vault only, never committed code.
+Uniform package content source, family-resolved. `source: ''` defaults to `dvd` on `rhel` and to `mirror` everywhere else, AlmaLinux, Rocky and Fedora included: they have public mirrors, RHEL does not. Satellite values come from inventory/vault only, never committed code.
 
 | Key                        | Type   | Default        | Description                                                        |
 | -------------------------- | ------ | -------------- | ----------------------------------------------------------------- |

roles/global_defaults/defaults/main.yml

@@ -78,7 +78,8 @@ system_defaults:
   timezone: "Europe/Vienna"
   locale: "en_US.UTF-8"
   keymap: "us"
-  # source: dvd|mirror|satellite|none ('' -> family default: EL=dvd, else mirror).
+  # source: dvd|mirror|satellite|none ('' -> family default: rhel=dvd, else mirror;
+  # almalinux/rocky/fedora have public mirrors, rhel does not).
   # satellite values come from inventory/vault only, never committed code.
   content:
     source: ""

tests/content/content_fixtures.yml

@@ -1,6 +1,6 @@
 ---
 # Raw system.content input -> expected normalized system_cfg.content. Covers family
-# source defaults (EL=dvd, else mirror), url pass-through, satellite inputs, and the
+# source defaults (rhel=dvd, else mirror), url pass-through, satellite inputs, and the
 # Arch reflector lock-out (dropped only when a custom mirror url is set).
 content_fixtures:
   - name: arch-mirror-url-drops-reflector