- all steps in a run share one browser/page instance so wizard state persists
- add 'sign' step type: execCode is {keyId} and signs via EDS widget on current page
- extract AuthService.loadKeyDescriptor() to deduplicate key file parsing
- extend StepType, DTOs, and MCP enums to include 'sign'
- add ScenarioRunEntity (pending|in_progress|pass|fail) and ScenarioRunStepEntity (waiting|pending|in_progress|pass|fail)
- add POST /scenarios/:id/run — creates run with first step pending, rest waiting
- add order field to ScenarioStepEntity and ScenarioRunStepEntity for deterministic sequential execution
- findOne and createRun now sort steps/stepRuns by order ASC
- add ScenarioEntity and ScenarioStepEntity with cascade delete
- step fields: type (login|exec), sessionName (required), execCode, validateCode
- login steps create a named session; exec steps consume it by sessionName
- full CRUD controller under /scenarios and /scenarios/:id/steps
- paginated GET /scenarios with page/limit query params returning { data, total, page, limit }
- register ScenarioModule and entities in AppModule