feat(ads/seo/release): v1.2.0 with live Google Ads, isolated ad profile, ads.txt, and SEO/AEO/GEO optimization

tests/Paca.Tests/Core/SmartPriorityQueueGateTests.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Paca.Mobile.Core;
+using Paca.Tests.Infrastructure;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+/// <summary>
+/// Gate 203 ~ 206: 스마트 대기열 우선순위 큐 및 동적 동시성 할당 엔진 기계적 검증
+/// </summary>
+public class SmartPriorityQueueGateTests
+{
+    [Fact]
+    public void Gate203_SmartPriorityQueue_Orders_By_Priority_Then_Time()
+    {
+        var queue = new SmartPriorityQueueManager();
+
+        queue.Enqueue("job-1", "Normal Job 1", DownloadPriorityLevel.Normal, DateTimeOffset.UtcNow.AddMinutes(-5));
+        queue.Enqueue("job-2", "Low Job", DownloadPriorityLevel.Low, DateTimeOffset.UtcNow.AddMinutes(-4));
+        queue.Enqueue("job-3", "Urgent Job", DownloadPriorityLevel.Urgent, DateTimeOffset.UtcNow); // 가장 나중에 추가됨
+
+        var list = queue.GetScheduledJobs();
+
+        Assert.Equal("job-3", list[0].Id); // Urgent가 최상단
+        Assert.Equal("job-1", list[1].Id); // Normal
+        Assert.Equal("job-2", list[2].Id); // Low
+    }
+
+    [Fact]
+    public void Gate204_SmartPriorityQueue_BumpToTop()
+    {
+        var queue = new SmartPriorityQueueManager();
+
+        queue.Enqueue("job-1", "Job 1", DownloadPriorityLevel.Normal);
+        queue.Enqueue("job-2", "Job 2", DownloadPriorityLevel.Normal);
+        queue.Enqueue("job-3", "Job 3", DownloadPriorityLevel.Normal);
+
+        // job-3을 맨 위로 올리기(Bump)
+        var bumped = queue.BumpToTop("job-3");
+        Assert.True(bumped);
+
+        var list = queue.GetScheduledJobs();
+        Assert.Equal("job-3", list[0].Id);
+        Assert.Equal(DownloadPriorityLevel.Urgent, list[0].Priority);
+    }
+
+    [Theory]
+    [InlineData(NetworkProfileType.WiFi, 4)]
+    [InlineData(NetworkProfileType.Cellular5G, 3)]
+    [InlineData(NetworkProfileType.CellularLTE, 2)]
+    [InlineData(NetworkProfileType.Cellular3G, 1)]
+    public void Gate205_DynamicConcurrencyAllocator_Adjusts_By_Network(NetworkProfileType network, int expectedConcurrency)
+    {
+        var concurrency = DynamicConcurrencyAllocator.DetermineMaxConcurrentDownloads(network, isBatterySavingMode: false);
+        Assert.Equal(expectedConcurrency, concurrency);
+
+        // 배터리 절약 모드 켜지면 무조건 1개로 제한
+        var batterySavingConcurrency = DynamicConcurrencyAllocator.DetermineMaxConcurrentDownloads(network, isBatterySavingMode: true);
+        Assert.Equal(1, batterySavingConcurrency);
+    }
+
+    [Fact]
+    public void Gate206_ServerHost_QueuePriority_Endpoint_Audit()
+    {
+        var serverHostPath = Path.Combine(SourceTree.Root, "src", "Paca.Server", "ServerHost.cs");
+        Assert.True(File.Exists(serverHostPath), "ServerHost.cs must exist");
+
+        var code = File.ReadAllText(serverHostPath);
+
+        Assert.Contains("/api/queue/{id}/priority", code);
+    }
+}