[Observium] Eventlog incorrectly says interface circuit attribute has changed on every poll

We have some very long interface aliases (130 characters). The Observium parsed circuit ID is 66 characters but it appears to be limited to 64 characters somewhere. The annoying part is every time the device is polled a message is written to the eventlog saying the circuit ID has changed, showing the parsed circuit ID and a truncated version of it. We don't need the character limit increased (although that would be nice); we want the constant (incorrect) eventlog messages to stop (without changing the configured interface alias).

(For those curious, the long circuit IDs are for circuits made of up several segments chained together from multiple providers.)

Corwin