Add Symfony payload mapping, fixtures, and QA tooling

server/migrations/Version20240919000000.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20240919000000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Create signals table';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('CREATE TABLE signals (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, user_key VARCHAR(64) NOT NULL, lat DOUBLE PRECISION NOT NULL, lng DOUBLE PRECISION NOT NULL, created_at DATETIME NOT NULL)');
+        $this->addSql('CREATE INDEX idx_signals_created_at ON signals (created_at)');
+        $this->addSql('CREATE INDEX idx_signals_user_key ON signals (user_key)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP TABLE signals');
+    }
+}