didWebServer additions

[dblane-digicatapult]

Pull Request

Checklist

• Have you read Digital Catapult's Code of Conduct?
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.

PR Type

Please delete options that are irrelevant.

• Bug Fix
• Chore
• Feature
• Documentation Update
• Code style update (formatting, local variables)
• Breaking Change (fix or feature that would cause existing functionality to change)

Linked tickets

VR-512

High level description

add optional didWebServer support to veritable-cloudagent chart

Detailed description

• Add didWebServer configuration section with env vars, service, and ingress
• Include database migration init container for DidWebServer DB and tables
• Use existing endpoint helper as fallback for DID_WEB_SERVICE_ENDPOINT
• Add comprehensive documentation and README updates
• Bump chart version to 2.5.0
• Document race condition TODO for DID document generation timing

Describe alternatives you've considered

Operational impact

Additional context