Change discordId type from integer to string across frontend, backend, and API schema for consistency and proper validation.

backend/src/main/java/com/alttd/altitudeweb/controllers/forms/AppealController.java

@@ -39,8 +39,9 @@ public class AppealController implements AppealsApi {
     private final com.alttd.altitudeweb.services.discord.AppealDiscord appealDiscord;
 
     @Override
-    public ResponseEntity<BannedUserResponseDto> getBannedUser(Long discordId) throws Exception {
-        return new ResponseEntity<>(discordAppeal.getBannedUser(discordId), HttpStatus.OK);
+    public ResponseEntity<BannedUserResponseDto> getBannedUser(String discordId) throws Exception {
+        long discordIdAsLong = Long.parseLong(discordId);
+        return new ResponseEntity<>(discordAppeal.getBannedUser(discordIdAsLong), HttpStatus.OK);
     }
 
     @RateLimit(limit = 3, timeValue = 1, timeUnit = TimeUnit.HOURS, key = "discordAppeal")

backend/src/main/java/com/alttd/altitudeweb/mappers/BannedUserToBannedUserDtoMapper.java

@@ -8,7 +8,7 @@ import org.springframework.stereotype.Service;
 public class BannedUserToBannedUserDtoMapper {
 
     public BannedUserDto map(BannedUser bannedUser) {
-        return new BannedUserDto(bannedUser.userId(), bannedUser.reason(), bannedUser.name(), bannedUser.avatarUrl());
+        return new BannedUserDto(String.valueOf(bannedUser.userId()), bannedUser.reason(), bannedUser.name(), bannedUser.avatarUrl());
     }
 
 }

backend/src/main/java/com/alttd/altitudeweb/mappers/DiscordAppealDtoToDiscordAppealMapper.java

@@ -14,7 +14,7 @@ public class DiscordAppealDtoToDiscordAppealMapper {
         return new DiscordAppeal(
                 UUID.randomUUID(),
                 loggedInUserUuid,
-                discordAppealDto.getDiscordId(),
+                Long.parseLong(discordAppealDto.getDiscordId()),
                 discordUsername,
                 discordAppealDto.getAppeal(),
                 Instant.now(),

backend/src/main/java/com/alttd/altitudeweb/services/forms/DiscordAppeal.java

@@ -49,7 +49,8 @@ public class DiscordAppeal {
 
     public FormResponseDto submitAppeal(DiscordAppealDto discordAppealDto) {
         DiscordAppealDiscord discordAppealDiscord = DiscordAppealDiscord.getInstance();
-        Optional<BannedUser> join = discordAppealDiscord.getBannedUser(discordAppealDto.getDiscordId()).join();
+        long discordId = Long.parseLong(discordAppealDto.getDiscordId());
+        Optional<BannedUser> join = discordAppealDiscord.getBannedUser(discordId).join();
         if (join.isEmpty()) {
             throw new ResponseStatusException(HttpStatus.NOT_FOUND, "User not found");
         }