The player pings /track/watch every 30s with the CUMULATIVE position, and each
ping inserted a new row (~18 rows per viewing, 254k/day). SUM(seconds_watched)
therefore summed cumulative snapshots: a single 58-minute viewing reported as
4238 minutes (~73x), skewing TrendingController's watch-minute ranking and the
admin "total_sec"/"plays" figures.
Upsert per (session_id, episode_id) so SUM is the real watch time and COUNT is
the real play count. Adds the supporting index.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
ayrisdevandClaude Opus 4.8
2ef6916891