refactor ♻️: Refactor regex and add debug info

Refactored the regular expression to improve pattern matching and added debug information for better traceability in the `tasks/main.yml` file.

tasks/main.yml

@@ -20,10 +20,10 @@
       {{
         bridge_links.stdout_lines
         | select('search', 'master ' ~ wol_bridge)
-        | map('regex_replace', '^\\d+: ([^:@]+).*', '\\1')
-        | reject('search', '^tap')
-        | reject('search', '^fw')
-        | reject('equalto', '')
+        | select('match', '^\\d+: [a-zA-Z0-9]+:')
+        | reject('search', ' veth')
+        | reject('search', ' tap')
+        | map('regex_replace', '^\\d+: ([^:]+):.*', '\\1')
         | first
       }}
 
@@ -32,6 +32,8 @@
     msg: >
       Unable to detect physical NIC backing {{ wol_bridge }}.
       Please set wol_interface explicitly.
+      Bridge output:
+      {{ bridge_links.stdout_lines }}
   when: wol_detected_phy | default('') | length == 0
 
 # ------------------------------------------------------------