feat(backend): report context, fix deleting reports

Foxnouns.Backend/Database/Models/AuditLogEntry.cs

@@ -12,6 +12,7 @@
 //
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
+using System.ComponentModel.DataAnnotations.Schema;
 using Foxnouns.Backend.Utils;
 using Newtonsoft.Json;