Both had a basic HTTP check (Emby) or no coverage at all (Jellyfin), but
neither would have caught today's real incident: Jellyfin's SQLite
database locked up hard (repeated 'database table is locked' errors,
30s+ query timeouts) while its own /System/Info endpoint kept responding
200 the whole time — a basic HTTP check on that endpoint would never have
tripped. /Users forces an actual DB round-trip and was confirmed live to
hang during the exact incident.
Generalized the API check's success condition to also accept array-shaped
responses (/Users returns an array; the existing check only recognized
object fields like .ServerName/.Id/.Version, which would error when
applied to an array) — benefits any future array-returning endpoint, not
just this one. Also corrected the host.conf.template's API_CHECKS format
comment, which described a 3-field format the code never actually used.
Gmer4Lfe
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