remove wrapup video rendering (ffmpeg)

SPA handles wrapup visuals client-side; server-side
renderer was dead code pulling in ffmpeg + image crates.

crates/adapters/template-askama/src/lib.rs

@@ -481,5 +481,4 @@ pub struct WrapUpPageTemplate<'a> {
     pub genre_max: u32,
     pub rating_pcts: [f64; 5],
     pub genre_pcts: Vec<f64>,
-    pub video_url: Option<String>,
 }