Verifies the service enters failed state after exhausting all
StartLimitBurst retries when the API never becomes available.
Checks StartLimitIntervalSec/Burst configuration and confirms
repeated timeout messages appear in the journal.
Tests networkNamespacePath and networkNamespaceService options.
Creates a network namespace, runs a mock Servarr inside it, verifies
namespace isolation (mock unreachable from default ns), and confirms
the init service provisions resources through the namespace.
Exercises the naming option which was previously untested.
Verifies fields are applied to Sonarr via config/naming API
and validates idempotency (second run reports 'already correct').
