- Implemented `DagScheduler` in `workflow-orchestrator` to manage task dependencies and commit history.
- Added `vgcs.merge_commits` in `workflow-context` for smart 3-way merge of parallel task branches.
- Introduced generic `WorkflowTaskCommand` and `WorkflowTaskEvent` in `common-contracts`.
- Adapted `tushare-provider-service` with `generic_worker` to support Git-based context read/write.
- Updated NATS subjects to support wildcard routing for generic workflow commands.
- Fix `simple_test_analysis` template in E2E test setup to align with Orchestrator's data fetch logic.
- Implement and verify additional E2E scenarios:
- Scenario C: Partial Provider Failure (verified error propagation fix in Orchestrator).
- Scenario D: Invalid Symbol input.
- Scenario E: Analysis Module failure.
- Update `WorkflowStateMachine::handle_report_failed` to correctly scope error broadcasting to the specific task instead of failing effectively silently or broadly.
- Update testing strategy documentation to reflect completed Phase 4 testing.
- Skip Scenario B (Orchestrator Restart) as persistence is not yet implemented (decision made to defer persistence).
