Continued the country-by-country pass against the CI failed-channel
report. Verified every replacement URL with curl before applying.
Also fixed a malformed nested-bracket markdown link in belarus.md.
China: 10, Portugal: 5 (+2 duplicates removed), Poland: 6,
Korea: 2, Albania: 3, Australia: 4, Belarus: 3,
Bosnia and Herzegovina: 1, Iraq: 3, North Macedonia: 2,
Canada: 3, India: 1, Taiwan: 3, Chile: 1, Sweden: 1
The whole www.tvkaista.net/stream-forwarder/get.php proxy is now
returning 502 Bad Gateway, so several Poland/Slovenia rows that were
still marked valid were actually broken. Replaced TVP1, TVP Polonia,
TVP Info, TVP World with working alternatives; the rest are marked
invalid pending a working replacement (TV SLO 1/2/3 candidates found
but not yet verified due to a fetch rate limit).