Record submission source in database.

The motivation for this is that we can use the data to fix the various
errors we have seen across the interface when shadowing one by one.
But it can also be useful for other reasons, e.g. being able to count
how many submissions were received via the API vs web UI.

Author: meisterT

webapp/migrations/Version20250907161952.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20250907161952 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add submission source to submission info.';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('ALTER TABLE submission ADD source VARCHAR(255) NOT NULL DEFAULT \'unknown\' COMMENT \'Where did we receive this submission from?\'');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('ALTER TABLE submission DROP source');
+    }
+
+    public function isTransactional(): bool
+    {
+        return false;
+    }
+}

webapp/src/Entity/Submission.php

@@ -102,6 +102,12 @@ class Submission extends BaseApiEntity implements
     #[Serializer\Groups([ARC::GROUP_NONSTRICT])]
     private ?string $importError = null;
 
+    #[ORM\Column(options: [
+        'comment' => 'Where did we receive this submission from?',
+    ])]
+    #[Serializer\Exclude]
+    private SubmissionSource $source = SubmissionSource::UNKNOWN;
+
     #[ORM\ManyToOne(inversedBy: 'submissions')]
     #[ORM\JoinColumn(name: 'cid', referencedColumnName: 'cid', onDelete: 'CASCADE')]
     #[Serializer\Exclude]
@@ -553,4 +559,15 @@ public function getFileForApi(): array
     {
         return array_filter([$this->fileForApi]);
     }
+
+    public function setSource(SubmissionSource $source): Submission
+    {
+        $this->source = $source;
+        return $this;
+    }
+
+    public function getSource(): SubmissionSource
+    {
+        return $this->source;
+    }
 }

webapp/src/Service/SubmissionService.php

@@ -700,7 +700,8 @@ public function submitSolution(
             ->setOriginalSubmission($originalSubmission)
             ->setEntryPoint($entryPoint)
             ->setExternalid($externalId)
-            ->setImportError($importError);
+            ->setImportError($importError)
+            ->setSource($source);
 
         // Add expected results from source. We only do this for jury submissions
         // to prevent accidental auto-verification of team submissions.