Implement tenant announcements and audit log fixes

app/Models/Tenant.php

@@ -70,6 +70,17 @@ class Tenant extends Model
         return $this->hasMany(TenantPackage::class);
     }
 
+    public function announcements(): BelongsToMany
+    {
+        return $this->belongsToMany(TenantAnnouncement::class, 'tenant_announcement_targets')
+            ->withTimestamps();
+    }
+
+    public function announcementDeliveries(): HasMany
+    {
+        return $this->hasMany(TenantAnnouncementDelivery::class);
+    }
+
     public function packages(): BelongsToMany
     {
         return $this->belongsToMany(Package::class, 'tenant_packages')