feat: Add Go module and workspace test fixtures

- Created expected JSON files for Go modules and workspaces.
- Added go.mod and go.sum files for example projects.
- Implemented private module structure with expected JSON output.
- Introduced vendored dependencies with corresponding expected JSON.
- Developed PostgresGraphJobStore for managing graph jobs.
- Established SQL migration scripts for graph jobs schema.
- Implemented GraphJobRepository for CRUD operations on graph jobs.
- Created IGraphJobRepository interface for repository abstraction.
- Added unit tests for GraphJobRepository to ensure functionality.

deploy/compose/env/mock.env.example

@@ -0,0 +1,12 @@
+# Dev-only overlay env for docker-compose.mock.yaml
+# Use together with dev.env.example:
+#   docker compose --env-file env/dev.env.example --env-file env/mock.env.example -f docker-compose.dev.yaml -f docker-compose.mock.yaml config
+
+# Optional: override ports if you expose mock services
+ORCHESTRATOR_PORT=8450
+POLICY_REGISTRY_PORT=8451
+VEX_LENS_PORT=8452
+FINDINGS_LEDGER_PORT=8453
+VULN_EXPLORER_API_PORT=8454
+PACKS_REGISTRY_PORT=8455
+TASK_RUNNER_PORT=8456