v0.1.100: Introduce the first operational MRWIF source-spec surface

Summary

This release introduces the first operational MRWIF surface in rwif-builder.

MRWIF is no longer just a documented bridge-realm concept. It now has an initial, working source-spec implementation with validation, inspection, and diff support for explicit multimodal correspondence review.

What’s Included

• added a new mrwif package with:
  • source-spec validation
  • source-spec inspection
  • source-spec diff
• added new CLI commands:
  • mrwif-validate-spec
  • mrwif-inspect
  • mrwif-diff
• defined the initial MRWIF document shape around:
  • linked_artifacts
  • intent_mappings
  • interpretation_records
  • revision_traces
• updated realm documentation so MRWIF is now represented as an initial operational bridge surface rather than a draft-only target
• added focused regression coverage for the new MRWIF flow

Why This Release Matters

This is the first release where MRWIF becomes real inside the repo.

Until now, the project had operational semantic, audio, and partial visual reasoning surfaces, but no implemented bridge realm for explicit multimodal correspondence. v0.1.100 closes that gap with a deliberately narrow first slice that is inspectable, testable, and ready to extend.

Validation

• added focused MRWIF regression coverage in tests.test_mrwif
• validated combined regressions with:

PYTHONPATH=src python -m unittest tests.test_vrwif tests.test_arwif tests.test_mrwif