CPS-872 CM Handle State: define and agree new dmi-registry yang model supporting States

NCMP should be able to handle a large (10,000s!) batch of registrations at once. To make this possible we need to

	Task
1	Create updated DMI Registry Yang Schema (using @yyyy-mm-dd) in changelog/db/changes/data/yang-models/dmi-registry @ 2021-12-13.yang to store Handle State
2	Add State, LockReason and LockReasonDetails as (Yang)Strings to the schema. Any validation or enum-limitations can be handled in the Java code.
3	Consider timestamp for retry and timeout related scenarios as part of same schema update to reduce overhead of Liquibase changesets Schedule meeting for retry mechanism and necessary variables
4	Test/demo using CPS-Core Can create anchor with new schema Can add and create data

	A/C
1	Propose and agree new model with team and stakeholders
2	Demo Can create anchor using new model Can add data for new model Can query data using file based on state
3	Agree new name for dataspace. Replace Admin dataspace?
4	Describe impacts to codebase

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