feat: normalize email addresses to lowercase on write

src/BusProNet/Model/Communication.php

@@ -39,7 +39,9 @@ class Communication
 
     public function setEmail(?string $email): static
     {
-        $this->email = $email;
+        // BusPro compares addresses case-insensitively; normalize on the way in so the DTO
+        // carries the same shape the entities store.
+        $this->email = null === $email ? null : mb_strtolower(trim($email));
 
         return $this;
     }

src/Entity/Contact.php

@@ -75,7 +75,7 @@ class Contact
 
     public function setEmail(string $email): static
     {
-        $this->email = $email;
+        $this->email = mb_strtolower(trim($email));
 
         return $this;
     }

src/Entity/Embeddable/Communication.php

@@ -108,7 +108,7 @@ class Communication
 
     public function setEmail(?string $email): static
     {
-        $this->email = $email;
+        $this->email = null === $email ? null : mb_strtolower(trim($email));
 
         return $this;
     }

src/Security/BpnAuthenticator.php

@@ -43,7 +43,7 @@ class BpnAuthenticator extends AbstractLoginFormAuthenticator implements Authent
 
     public function authenticate(Request $request): Passport
     {
-        $email = trim($request->request->getString('_username'));
+        $email = mb_strtolower(trim($request->request->getString('_username')));
         $passwordPlain = trim($request->request->getString('_password'));
 
         // Very lame hashing applied here as required by BPN