feat(email): export send attempt metadata

Add content-free provider delivery history to encrypted and daily owner exports, exclude payload hashes, and lock in tenant-safe hard-delete cascades.

JobTrackerApi/Services/DailyExportHostedService.cs

@@ -2,6 +2,7 @@ using System.Security.Cryptography;
 using System.Text;
 using System.Text.Json;
 using JobTrackerApi.Data;
+using JobTrackerApi.Models;
 using Microsoft.EntityFrameworkCore;
 
 namespace JobTrackerApi.Services;
@@ -61,6 +62,21 @@ public sealed class DailyExportHostedService(
             Correspondence = await db.Correspondences.AsNoTracking().Where(message => jobIds.Contains(message.JobApplicationId)).OrderBy(message => message.Date).ToListAsync(cancellationToken),
             Attachments = await db.Attachments.AsNoTracking().Where(attachment => jobIds.Contains(attachment.JobApplicationId)).OrderBy(attachment => attachment.UploadDate).ToListAsync(cancellationToken),
             Events = await db.JobEvents.AsNoTracking().Where(jobEvent => jobIds.Contains(jobEvent.JobApplicationId)).OrderBy(jobEvent => jobEvent.At).ToListAsync(cancellationToken),
+            EmailSendAttempts = await db.EmailSendAttempts.AsNoTracking()
+                .Where(attempt => jobIds.Contains(attempt.JobApplicationId))
+                .OrderBy(attempt => attempt.CreatedAtUtc)
+                .Select(attempt => new EmailSendAttemptExport(
+                    attempt.Id,
+                    attempt.JobApplicationId,
+                    attempt.Provider,
+                    attempt.ClientRequestId,
+                    attempt.Status,
+                    attempt.ProviderMessageId,
+                    attempt.FailureCategory,
+                    attempt.CreatedAtUtc,
+                    attempt.StartedAtUtc,
+                    attempt.CompletedAtUtc))
+                .ToListAsync(cancellationToken),
             Rules = await RulesEngine.GetSettings(db, cancellationToken),
         };