make-finals.sh: skip corrupt temp files (moov atom not found)

Check ffprobe output before encoding — empty/N/A duration means the
file is corrupt or truncated; skip with a clear message rather than
passing a bad input to ffmpeg.

https://claude.ai/code/session_01C4jbd3waXG3eKZYbGUjLUQ

make-finals.sh

@@ -108,7 +108,12 @@ while IFS= read -r -d '' temp_file; do
         continue
     fi
 
-    raw_dur=$(ffprobe -v error -show_entries format=duration -of csv=p=0 "$temp_file")
+    raw_dur=$(ffprobe -v error -show_entries format=duration -of csv=p=0 "$temp_file" 2>/dev/null || true)
+    if [ -z "$raw_dur" ] || [ "$raw_dur" = "N/A" ]; then
+        echo "SKIP (corrupt/unreadable): $temp_file"
+        (( skipped++ )) || true
+        continue
+    fi
     speed=$(echo "scale=6; $raw_dur / $target" | bc)
 
     echo "MAKE  $cam/$ASTRO_YEAR/$SEASON/Mvt$MVT_NUM/$(basename "$final")  [${speed}x]"