Ignore 'start-status' as shadow

Those are imported for the humans, but have nothing todo with shadowing
a contest.

Note that these are only sent by the CDS and not part of the spec.

(cherry picked from commit 8e78b10)

Author: vmcj

webapp/src/DataTransferObject/Shadowing/EventType.php

@@ -18,6 +18,7 @@ enum EventType: string
     case PROBLEMS = 'problems';
     case RUNS = 'runs';
     case STATE = 'state';
+    case START_STATUS = 'start-status';
     case SUBMISSIONS = 'submissions';
     case TEAMS = 'teams';
     case TEAM_MEMBERS = 'team-members';

webapp/src/Service/ExternalContestSourceService.php

@@ -623,7 +623,7 @@ public function importEvent(Event $event, array $eventsToSkip): void
 
         // Note the @vars here are to make PHPStan understand the correct types.
         $method = match ($event->type) {
-            EventType::ACCOUNTS, EventType::AWARDS, EventType::MAP_INFO, EventType::PERSONS, EventType::TEAM_MEMBERS => $this->ignoreEvent(...),
+            EventType::ACCOUNTS, EventType::AWARDS, EventType::MAP_INFO, EventType::PERSONS, EventType::START_STATUS, EventType::TEAM_MEMBERS => $this->ignoreEvent(...),
             EventType::STATE => $this->validateState(...),
             EventType::CONTESTS => $this->validateAndUpdateContest(...),
             EventType::JUDGEMENT_TYPES => $this->importJudgementType(...),