[Specification] Formally assign ids to coverages in OED specification

[johcarter]

Description

Unique ids (integers) will be assigned to all coverages in the OED specification, although the ids for the new financial coverages will not be embedded in OED fieldnames as they are for property.

Reasons for change

It is useful and practical for standard ids to be assigned to coverages for programming purposes.

Scope of change

A column of ids will be added to the new coverages table in the specification.

• Location File
• Accounts File
• Reinsurance Scope
• Reinsurance Info

Impact of change

None

[MattDonovan82]

Agree with these approaches. These notes on how to use the coverages will need to be clear and accessible in the documentation. Moving to done.

[johcarter]

please see https://github.com/OasisLMF/ODS_OpenExposureData/blob/release/4.0.0rc2/OpenExposureData/Docs/Notes.rst#coverage-values