Add Workflow table code_version and validation_state

[victorskl]

Context:

The upstream Workflow Manager has introduced 2 more props for the Workflow table: code_version and validation_state

See

• Implement Workflow model validation_state property OrcaBus/service-workflow-manager#61
• Include code_version into Workflow model OrcaBus/service-workflow-manager#95
• Support workflow version 4.4.6 OrcaBus/service-dragen-wgts-dna-pipeline-manager#75

Change Request:

• Add these 2 columns to mart.workflow table