feat(core) : add audit attributes, audit_log table and dedicated dbal connection

src/Shared/Domain/Attribute/AuditIgnore.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Shared\Domain\Attribute;
+
+use Attribute;
+
+/**
+ * Marker placed on an entity property to exclude it from audit tracking.
+ *
+ * Typical use: sensitive fields (password, apiToken). The AuditLogWriter also
+ * carries an exact-match blacklist on the most dangerous names as
+ * defense-in-depth, but the base rule is to annotate explicitly here.
+ */
+#[Attribute(Attribute::TARGET_PROPERTY)]
+final class AuditIgnore {}

src/Shared/Domain/Attribute/Auditable.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Shared\Domain\Attribute;
+
+use Attribute;
+
+/**
+ * Marker placed on a Doctrine entity to enable audit tracking.
+ *
+ * Located in Shared (not Core) so every module can use it without a
+ * circular dependency on Core. Any migrated business entity that should be
+ * traced carries this attribute, with #[AuditIgnore] on sensitive fields.
+ */
+#[Attribute(Attribute::TARGET_CLASS)]
+final class Auditable {}