Phase 1 (miroir-cdo): Core Routing verification complete

All 145 tests pass with 91.72% line coverage (exceeds 90% requirement).

Core routing components verified:
- router.rs: 96.20% coverage (rendezvous hashing, write targets, covering set)
- topology.rs: 100% coverage (node health, groups, state transitions)
- scatter.rs: 100% coverage (fan-out orchestration primitives)
- merger.rs: 95.45% coverage (result merge, facets, global sort)

DoD requirements met:
✅ Deterministic rendezvous assignment
✅ Minimal reshuffling on node add/remove
✅ Uniform shard distribution (64/3/RF=1 → 18-26 shards/node)
✅ write_targets returns exactly RG × RF nodes
✅ query_group distributes evenly
✅ covering_set returns one node per shard with replica rotation
✅ merger handles merge/facet/limit correctly
✅ ≥90% line coverage (achieved 91.72%)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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@@ -5,11 +5,11 @@
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.beads/traces/miroir-cdo.1/metadata.json

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.beads/traces/miroir-cdo.1/stderr.txt

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.beads/traces/miroir-cdo.2/stderr.txt

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