chore: consolidate skudak SMTP config to shared variables

- Update Gitea Skudak to use skudaknoreply_mail_* vault variables
- Remove redundant gitea_skudak_smtp_* variables from vault
- Update skudaknoreply credentials to noreply@skudak.com

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ansible/roles/git/tasks/gitea-skudak.yml

@@ -74,11 +74,11 @@
       # Mailer configuration for email confirmation
       GITEA__mailer__ENABLED: "true"
       GITEA__mailer__PROTOCOL: "smtps"
-      GITEA__mailer__SMTP_ADDR: "{{ gitea_skudak_smtp_host }}"
-      GITEA__mailer__SMTP_PORT: "{{ gitea_skudak_smtp_port }}"
-      GITEA__mailer__USER: "{{ gitea_skudak_smtp_user }}"
-      GITEA__mailer__PASSWD: "{{ gitea_skudak_smtp_pass }}"
-      GITEA__mailer__FROM: "{{ gitea_skudak_smtp_from }}"
+      GITEA__mailer__SMTP_ADDR: "{{ skudaknoreply_mail_host }}"
+      GITEA__mailer__SMTP_PORT: "465"
+      GITEA__mailer__USER: "{{ skudaknoreply_mail_user }}"
+      GITEA__mailer__PASSWD: "{{ skudaknoreply_mail_pass }}"
+      GITEA__mailer__FROM: "Skudak Git <{{ skudaknoreply_mail_user }}>"
       # Logging configuration - output to journald for fluent-bit capture
       GITEA__log__MODE: console
       GITEA__log__LEVEL: Info