feat: domain-model-init skill -- generate domain-model.json from project docs

[AlexMikhalev]

Summary

Create a Claude Code skill that generates an initial domain-model.json from project documentation (Google Docs, meeting notes, existing prose domain models).

Context

The CTO executive system now has:

• schemas/domain-model-base.schema.json -- core schema for any project type
• schemas/domain-model-client.schema.json -- extension for client projects (services, state machines, events)
• Generic scripts in scripts/domain-model/ for validation, vocabulary, KG entry generation

The ODILO domain model was manually converted from Google Docs prose to JSON. This skill automates that process.

Acceptance Criteria

• Skill reads project manifest (projects/<slug>/manifest.md) and linked Google Docs
• Extracts entities, relationships, avoid-terms from prose
• Generates domain-model.json conforming to base or client schema
• Runs validate-model.py against the generated model
• Outputs a summary of extracted terms and coverage gaps

Dependencies

• terraphim-skills Epic: Publishing domain model skills for terraphim v1.9 dynamic ontologies #43 (publishing skills epic) -- pattern reference
• terraphim-ai #545 (extract --schema) -- optional enhancement when available