feat(OpenGraph): DB - Create/Read Extension Edge Kind Schema Entry - BED-6790

[LawsonWillard]

Description

Added a new schema_edge_kinds table and the create and read by id methods used to interact with it. Added integration tests to cover these methods.

Motivation and Context

Resolves: BED-6790

This feature is required to enable OpenGraph schemas

How Has This Been Tested?

• Added integration tests for DB methods.

Types of changes

• New feature (non-breaking change which adds functionality)
• Database Migrations

Checklist:

• [x] I have met the contributing prerequisites
  • Assigned myself to this PR
  • Added the appropriate labels
  • Associated an issue: https://github.com/SpecterOps/BloodHound/issues/672
  • Read the Contributing guide: https://github.com/SpecterOps/BloodHound/wiki/Contributing
• [x] I have ensured that related documentation is up-to-date
  • Open API docs
  • Code comments (GoDocs / JSDocs)
• [x] I have followed proper test practices
  • Added/updated tests to cover my changes
  • All new and existing tests passed

Summary by CodeRabbit

• New Features
  • Added schema edge kind management: create and retrieve edge kinds for graph schema extensions (name, description, traversability).
  • Database migration adds backing table and index for edge kinds.
• Bug Fixes
  • Explicit error handling for duplicate edge kind names.
• Tests
  • Integration tests covering create, retrieve, duplicate-name and not-found scenarios.

_{✏️ Tip: You can customize this high-level summary in your review settings.}