[BUG] Compatibility Problem with Workflow Context Providers in Upgrade from 3.0.5 to 3.2

[sfmskywalker]

When running Elsa Workflows version 3.0.5 in a production environment, there is a consideration to upgrade to version 3.2. The primary concern involves several workflow definitions that utilize workflow context providers, specifically leveraging CustomProperties.

In version 3.2, the mechanism for saving workflow context providers has been changed from CustomProperties to PropertyBag. This change presents potential issues for existing workflows.

Steps to Reproduce

1. Use Elsa Workflows 3.0.5 with workflow definitions that utilize CustomProperties.
2. Upgrade to Elsa Workflows 3.2.
3. Attempt to use the existing workflow definitions and observe the behavior related to workflow context providers.

Expected Behavior

Existing workflow instances should end correctly after the upgrade, and the workflow context provider configurations should remain functional.

Actual Behavior

There is a potential for suspended instances to not end correctly and for configurations to break due to changes from CustomProperties to PropertyBag.

Additional Information

• Current Elsa Workflows version: 3.0.5
• Target Elsa Workflows version: 3.2
• Workflow definitions use CustomProperties

[sfmskywalker]

Fixed via #5861