Implement deterministic generation pipeline and generation profile model for the first supported output style

[kalen-releasedgroup]

Summary

Create the generation backbone that turns approved scenarios into reproducible output.

Scope

• Implement generation orchestration from scenario version plus generation profile.
• Support the first approved output style for v1.
• Persist generator kind, template profile, template version, checksum, and output manifest data.

Requirement Links

• FR-GEN-001, FR-GEN-007, FR-GEN-008, FR-GEN-010
• Sections 5.3.3, 7.2.11, 19

Dependencies

• Immutable scenario versions
• Generator ADR direction

Exit Criteria

• Approved scenarios can be generated deterministically.
• Generation metadata is persisted with sufficient traceability.
• The first generation profile is clearly defined and repeatable.