Samir Boulahtit e61e02fb39 fix(redis): configure maxmemory and eviction policy to prevent OOM ...

Redis had no maxmemory set, causing the Prometheus alert expression
(used/max) to evaluate to +Inf. Set maxmemory to 100mb with allkeys-lru
eviction policy, and guard the alert expression against division by zero.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-01 17:57:38 +01:00

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