JP IPTV Clean 2.4.0

Mode: Upstream First

Playlist: https://jp-iptv-clean-v240.pages.dev/JP.m3u
Status:   https://jp-iptv-clean-v240.pages.dev/status.json
Refresh:  https://jp-iptv-clean-v240.pages.dev/refresh

Upstreams:
1. iptv-org Japan stream source
2. Free-TV Japan list

V2.4.0:
- no global crawling
- no wrapper chasing
- pull true Japan upstreams directly
- refresh upstream data every 6 hours
- strict URL/ID dedupe
- same channel: merge multiple upstream routes
- directly use upstream updates when source links change
- priority deep HLS checks on important channels
- last-known-good route can be retained for a checked channel
- up to 100 output channels
- paid/subscription channel names may remain if present upstream
- no login/DRM/token/paywall bypass

Principle:
Upstream finds channels. We clean, merge, verify, and publish.