Phase 70-C enables detection of merge relay patterns where multiple inner
loops update the same owner-owned variable. This allows compile-time
validation that relay sources can be merged at owner scope's exit PHI.
Changes:
- phase70c-merge-relay.md: New SSOT doc for merge relay semantics
- normalized_joinir_min.rs: +2 integration tests
Tests: normalized_dev 54/54 PASS, lib 950/950 PASS
Design: Validator accepts multiple relays to same owner (individually valid)
🤖 Generated with Claude Code
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
