Add MessengerLog, async mailer, doctrine fixes

- MessengerLog entity: store all messenger failures with full details
- MessengerFailureSubscriber: log errors + send alert email synchronously
- MailerService: dispatch emails via Messenger bus (async)
- Makefile: add entity command
- Doctrine: enable Second Level Cache in prod, remove deprecated config
- Liip Imagine: set twig mode to lazy
- Fix app.scss @use/@import

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

migrations/Version20260318203734.php

@@ -0,0 +1,38 @@
+<?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 Version20260318203734 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE TABLE email_tracking (id INT GENERATED BY DEFAULT AS IDENTITY NOT NULL, message_id VARCHAR(64) NOT NULL, recipient VARCHAR(255) NOT NULL, subject VARCHAR(255) NOT NULL, state VARCHAR(10) NOT NULL, sent_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, opened_at TIMESTAMP(0) WITHOUT TIME ZONE DEFAULT NULL, PRIMARY KEY (id))');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_A31A7D55537A1329 ON email_tracking (message_id)');
+        $this->addSql('CREATE TABLE "user" (id INT GENERATED BY DEFAULT AS IDENTITY NOT NULL, email VARCHAR(180) NOT NULL, first_name VARCHAR(255) NOT NULL, last_name VARCHAR(255) NOT NULL, roles JSON NOT NULL, password VARCHAR(255) NOT NULL, created_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, PRIMARY KEY (id))');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_8D93D649E7927C74 ON "user" (email)');
+        $this->addSql('CREATE TABLE messenger_messages (id BIGINT GENERATED BY DEFAULT AS IDENTITY NOT NULL, body TEXT NOT NULL, headers TEXT NOT NULL, queue_name VARCHAR(190) NOT NULL, created_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, available_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, delivered_at TIMESTAMP(0) WITHOUT TIME ZONE DEFAULT NULL, PRIMARY KEY (id))');
+        $this->addSql('CREATE INDEX IDX_75EA56E0FB7336F0E3BD61CE16BA31DBBF396750 ON messenger_messages (queue_name, available_at, delivered_at, id)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP TABLE email_tracking');
+        $this->addSql('DROP TABLE "user"');
+        $this->addSql('DROP TABLE messenger_messages');
+    }
+}