♻️ Extract the Storage service to DysonNetwork.Drive microservice

DysonNetwork.Drive/Handlers/LastActiveFlushHandler.cs

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+using Microsoft.EntityFrameworkCore;
+using NodaTime;
+using Quartz;
+using DysonNetwork.Drive.Auth;
+using DysonNetwork.Drive.Models;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace DysonNetwork.Drive.Handlers;
+
+public class LastActiveInfo
+{
+    public Session Session { get; set; } = null!;
+    public Account Account { get; set; } = null!;
+    public Instant SeenAt { get; set; }
+}
+
+public class LastActiveFlushHandler(IServiceProvider serviceProvider) : IFlushHandler<LastActiveInfo>
+{
+    public async Task FlushAsync(IReadOnlyList<LastActiveInfo> items)
+    {
+        using var scope = serviceProvider.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<AppDatabase>();
+
+        // Remove duplicates by grouping on (sessionId, accountId), taking the most recent SeenAt
+        var distinctItems = items
+            .GroupBy(x => (SessionId: x.Session.Id, AccountId: x.Account.Id))
+            .Select(g => g.OrderByDescending(x => x.SeenAt).First())
+            .ToList();
+
+        // Build dictionaries so we can match session/account IDs to their new "last seen" timestamps
+        var sessionIdMap = distinctItems
+            .GroupBy(x => x.SessionId)
+            .ToDictionary(g => g.Key, g => g.Last().SeenAt);
+
+        var accountIdMap = distinctItems
+            .GroupBy(x => x.AccountId)
+            .ToDictionary(g => g.Key, g => g.Last().SeenAt);
+
+        // Update sessions using native EF Core ExecuteUpdateAsync
+        foreach (var kvp in sessionIdMap)
+        {
+            await db.AuthSessions
+                .Where(s => s.Id == kvp.Key)
+                .ExecuteUpdateAsync(s => s.SetProperty(x => x.LastGrantedAt, kvp.Value));
+        }
+
+        // Update account profiles using native EF Core ExecuteUpdateAsync
+        foreach (var kvp in accountIdMap)
+        {
+            await db.AccountProfiles
+                .Where(a => a.AccountId == kvp.Key)
+                .ExecuteUpdateAsync(a => a.SetProperty(x => x.LastSeenAt, kvp.Value));
+        }
+    }
+}
+
+public class LastActiveFlushJob(FlushBufferService fbs, LastActiveFlushHandler hdl) : IJob
+{
+    public async Task Execute(IJobExecutionContext context)
+    {
+        await fbs.FlushAsync(hdl);
+    }
+}