Feat/significant investigative info

[jusdino]

Description List

• Added investigation create/close API endpoints
• Added license|privilege.investigation events
• Added investigation event listeners for notifications
• Added state notification email templates
• Added tests covering all new functionality

Testing List

• Code review

Closes #1133

Summary by CodeRabbit

• New Features

  • Investigation workflows: create/close investigations for licenses & privileges, optional encumbrance-on-close, investigationStatus and investigations lists in API responses, event publishing, and jurisdictional email notification listeners.

• Tests

  • Extensive unit, integration, function and smoke tests added for investigation flows, handlers, event publishing, notifications, API wiring and end-to-end scenarios.

• Documentation

  • Postman collection updated; OpenAPI spec removed one public jurisdictions endpoint; request/response examples refreshed.

• Chores

  • Broad dependency and Python target updates across projects.