feat: add support for optional MAIL_FROM secret to customize Brevo sender email

as-talange-core/src/main/java/com/astalange/core/service/PaiementEmailService.java

@@ -28,7 +28,7 @@ public class PaiementEmailService {
     private final JavaMailSender mailSender;
     private final PaiementRepository paiementRepository;
 
-    @Value("${spring.mail.username:noreply@as-talange.fr}")
+    @Value("${app.mail.from:${spring.mail.username:noreply@as-talange.fr}}")
     private String fromEmail = "noreply@as-talange.fr";
 
     public PaiementEmailService(@Autowired(required = false) JavaMailSender mailSender,

as-talange-core/src/main/java/com/astalange/core/service/SportEasyEmailService.java

@@ -30,7 +30,7 @@ public class SportEasyEmailService {
     @Value("${sporteasy.base-url:https://www.sporteasy.net/join/}")
     private String sportEasyBaseUrl;
 
-    @Value("${spring.mail.username:noreply@as-talange.fr}")
+    @Value("${app.mail.from:${spring.mail.username:noreply@as-talange.fr}}")
     private String fromEmail;
 
     public SportEasyEmailService(LicenceRepository licenceRepository,