EC needs to be able to pause each asset price feed (from all oracle node operators)

[otoole-brendan]

What is the Problem Being Solved?

As a member of the EC, I need to be able to pause accepting a particular asset's price feed i.e. in emergency scenarios

Description of the Design

Include a price feed identifier in the PushPrice invitation description so that invitation filtering can select on it

(internal chat link)

Security Considerations

Unknown

Test Plan

[otoole-brendan]

Discussed with Rowland. We are seeking further guidance from Chainlink. In the meantime - @turadg could this work be estimated?