The radarr/sonarr/lidarr/bookshelf events entrypoints built their client
with XClient.fromEnv() at import time, which throws when no API key/URL is
available yet — crash-looping the runtime container. The tools already
guard this; the events entrypoint did not.
Mirror the tools' guard: build the client in a try/catch, and only start
the poll loop when it succeeds. When it fails, log one line and stay idle
until a key is available. Behaviour when configured is unchanged.
Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF
jschoubben
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