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/VideoFrameRateConverterGateTests.cs

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+using System;
+using Paca.Core;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+public class VideoFrameRateConverterGateTests
+{
+    [Fact]
+    public void Gate421_VideoFrameRateConverter_BuildsSimpleFpsFilter()
+    {
+        var filter = VideoFrameRateConverter.BuildFpsFilter(60, FrameRateConversionMode.Simple);
+        Assert.Equal("fps=60", filter);
+    }
+
+    [Fact]
+    public void Gate422_VideoFrameRateConverter_BuildsMotionInterpolationFilter()
+    {
+        var filter = VideoFrameRateConverter.BuildFpsFilter(60, FrameRateConversionMode.MotionCompensated);
+        Assert.Contains("minterpolate=", filter);
+        Assert.Contains("fps=60", filter);
+        Assert.Contains("mi_mode=mci", filter);
+    }
+
+    [Fact]
+    public void Gate423_VideoFrameRateConverter_BuildsBlendFilter()
+    {
+        var filter = VideoFrameRateConverter.BuildFpsFilter(60, FrameRateConversionMode.FrameBlend);
+        Assert.Contains("tblend=all_mode=average", filter);
+        Assert.Contains("framerate=fps=60", filter);
+    }
+
+    [Fact]
+    public void Gate424_VideoFrameRateConverter_BuildsFullFfmpegCli()
+    {
+        var args = VideoFrameRateConverter.BuildFfmpegArgs("in.mp4", "out.mp4", 60, FrameRateConversionMode.MotionCompensated, crf: 18);
+
+        Assert.Contains("-i \"in.mp4\"", args);
+        Assert.Contains("-vf \"minterpolate=", args);
+        Assert.Contains("-c:v libx264 -crf 18", args);
+        Assert.Contains("-c:a copy", args);
+        Assert.Contains("\"out.mp4\"", args);
+    }
+}