Is your feature request related to a use case or problem? Please describe.

Part of #3235.

PR #3480 added a lookup table for constants in the circuit proto. Extending this table to more complex objects should help reduce the amount of network traffic required when using Quantum Engine.

Describe the solution you'd like

FrozenCircuits are a prime candidate for storing in the constants table, as they are often fairly large and may be repeated several times within a circuit.

What is the urgency from your perspective for this issue? Is it blocking important work?

P2 - we should do it in the next couple of quarters