The collector's oidc/* authenticators call out to authelia at startup, so a
restart that races authelia's own (a redeploy that touches both, a store
outage) can fail immediately. nixpkgs' upstream opentelemetry-collector
module sets Restart=always with no RestartSec, so systemd's defaults
(100ms RestartSec, 5-in-10s start limit) burn the whole allowance in well
under a second and leave the unit in start-limit-hit, dead until someone
resets it by hand.
Sets RestartSec=5 plus an explicit startLimitBurst/startLimitIntervalSec
window (12/120s) sized so the burst can never trip while authelia comes
back — same values host-modules/otel.nix already uses for the sibling
host-tier collector, which depends on authelia the same way. Pins the
[Unit]-vs-[Service] placement and the window relation in
module-eval-swarm-otel-core, mirroring module-eval-hive-otel's existing
case for the host tier.
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