* fix(redis): honor REDIS_SOCKET_CONNECT_TIMEOUT on non-sentinel clients
Previously only the sentinel path passed REDIS_SOCKET_CONNECT_TIMEOUT
through to the Redis client. Plain redis:// and cluster URLs fell back
to redis-py's default (no explicit connect timeout), so a hung Redis
or a black-holed network path could stall the whole worker until the
kernel gave up. Forwarding the same env var to from_url()/RedisCluster
keeps the behavior consistent across all deployment topologies.
* fix(redis): gate socket_connect_timeout on is-not-None, not truthiness
Addresses review feedback: the truthiness check on REDIS_SOCKET_CONNECT_TIMEOUT
silently dropped an explicit 0 value and was inconsistent with the sentinel
construction path, which forwards the value directly. Switch to `is not None`
so any user-configured value (including 0) is passed through to from_url()
and RedisCluster.from_url().
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Co-authored-by: Claude <noreply@anthropic.com>
