pub static INTERNER: LazyLock<ThreadedRodeo>Expand description
Global string interner shared across all FlowLog engines in the process.
Limitation: this is a process-local pool. In a distributed DD
deployment (multiple machines), each process gets its own independent
INTERNER, so Spur values are NOT comparable across machines.
Distributed support would require a global interning protocol or
switching back to String-keyed collections.