test(ypp): keep upload window fixture current

ytLive.Tests/ChannelStatsServiceTests.cs

@@ -40,6 +40,9 @@ public class ChannelStatsServiceTests
     [Fact]
     public async Task CaptureCurrent_RequestsNoAuditDetails_AndStillParsesTheSnapshot()
     {
+        var recentUpload = DateTime.UtcNow.AddDays(-10).ToString("O");
+        var olderUpload = DateTime.UtcNow.AddDays(-80).ToString("O");
+        var outsideWindow = DateTime.UtcNow.AddDays(-100).ToString("O");
         var auth = new YouTubeAuthService("test-client", "test-secret");
         auth.SetSession(new Models.YouTubeChannel
         {
@@ -55,11 +58,11 @@ public class ChannelStatsServiceTests
                       {"items":[{"id":"UC-1","statistics":{"subscriberCount":"350","viewCount":"12345","videoCount":"42"},
                                  "contentDetails":{"relatedPlaylists":{"uploads":"UPL"}}}]}
                       """
-                    : """
+                    : $$$$"""
                       {"items":[
-                        {"snippet":{"publishedAt":"2026-08-01T00:00:00Z"}},
-                        {"snippet":{"publishedAt":"2026-09-01T00:00:00Z"}},
-                        {"snippet":{"publishedAt":"2025-01-01T00:00:00Z"}}
+                        {"snippet":{"publishedAt":"{{{{recentUpload}}}}"}},
+                        {"snippet":{"publishedAt":"{{{{olderUpload}}}}"}},
+                        {"snippet":{"publishedAt":"{{{{outsideWindow}}}}"}}
                       ]}
                       """,
         };
@@ -81,4 +84,4 @@ public class ChannelStatsServiceTests
         Assert.Equal(2, snapshot.UploadsLast90Days);
         Assert.False(DateTime.UtcNow - snapshot.CapturedAtUtc > TimeSpan.FromMinutes(1));
     }
-}
+}