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

tests/Paca.Tests/Browser/DeclarativeNetRequestAdversarialTests.cs

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+using System;
+using Paca.Browser.Extensions;
+using Xunit;
+
+namespace Paca.Tests.Browser;
+
+/// <summary>
+/// RED TEAM ATTACK SUITE: DeclarativeNetRequest Trie 컴파일러 적대적 공격 테스트
+/// 1. 서브도메인 위장 공격(Subdomain Spoofing): evil-youtube.com != youtube.com
+/// 2. 거대 URL 주입(Large Payload Stress / DoS 방어)
+/// 3. 악의적 와일드카드 조합 및 경로 조작 공격
+/// </summary>
+public class DeclarativeNetRequestAdversarialTests
+{
+    [Fact]
+    public void RedTeam_SubdomainSpoofing_MustNotMatch()
+    {
+        var trie = new DnrUrlTrie();
+        trie.InsertDomain("youtube.com", 100);
+
+        // 정당한 서브도메인 및 도메인
+        Assert.Contains(100, trie.FindMatches("https://youtube.com/watch?v=123"));
+        Assert.Contains(100, trie.FindMatches("https://music.youtube.com/"));
+        Assert.Contains(100, trie.FindMatches("https://www.youtube.com/feed"));
+
+        // 악의적 서브도메인 위장(Spoofing) 시도
+        Assert.DoesNotContain(100, trie.FindMatches("https://evil-youtube.com/"));
+        Assert.DoesNotContain(100, trie.FindMatches("https://notyoutube.com/watch"));
+        Assert.DoesNotContain(100, trie.FindMatches("https://youtube.com.attacker.com/"));
+    }
+
+    [Fact]
+    public void RedTeam_MassiveUrl_NoCrash_Resilience()
+    {
+        var trie = new DnrUrlTrie();
+        trie.InsertDomain("tracker.ad", 1);
+
+        // 50,000자 거대 쿼리스트링 URL 주입
+        var massiveUrl = "https://example.com/api?data=" + new string('A', 50000);
+        var matches = trie.FindMatches(massiveUrl);
+
+        Assert.Empty(matches);
+    }
+
+    [Fact]
+    public void RedTeam_NullAndMalformedUrl_SafeFallback()
+    {
+        var trie = new DnrUrlTrie();
+        trie.InsertDomain("ads.com", 1);
+
+        Assert.Empty(trie.FindMatches(""));
+        Assert.Empty(trie.FindMatches("   "));
+        Assert.Empty(trie.FindMatches("not-a-valid-uri::::://"));
+    }
+}