release: v5.10.0 — group-audit-aware Method-A je_network export

[mivertowski]

Summary

v5.10 lifts the v5.9.0 single-entity Method-A accounting-network export to the consolidated-group level, so vynfi-group-audit-enterprise-2000 (and any other group-audit run) emits per-entity and consolidated je_network artefacts.

What's added

Artefact	Path	Schema
Per-entity	entities/{code}/graphs/je_network.{csv,parquet}	v5.8 13-col + ic_pair_id + ic_partner_entity (15 col)
Consolidated	consolidated/je_network.{csv,parquet}	18 col — adds entity_code, is_eliminated, eliminates_ic_pair_id

Both formats land in the existing per-entity graphs/ directory and the existing top-level consolidated/ directory, matching the v5.0 group-audit layout convention.

Implementation

• New shared helper datasynth_runtime::je_network::build_je_network_edges() — pure builder reused by the single-entity output_writer and the new group emitter. Single-entity CSV output is byte-identical to v5.9.0 (existing tests/je_network_export.rs integration test continues to pass).
• New module crates/datasynth-group/src/aggregate/je_network.rs (the writer) wires into aggregate/driver.rs immediately after eliminations_to_journal_entries runs.
• Schema additions surface JournalEntryHeader::ic_pair_id and ic_partner_entity (already populated since v5.0); elimination JEs are marked is_eliminated=true with entity_code set to the group_id.

Validated against mini_nestle.yaml

End-to-end via datasynth-data group generate:

• 4 per-entity je_network.{csv,parquet} files (NESTLE_SA / NESTLE_USA / NESTLE_DE / NESTLE_BR)
• 368 elimination edges
• 69,287 consolidated edges
• 376 IC-pair edges (matched seller + buyer sides)
• Coverage 0.9583

Roadmap (post-merge)

VynFi/vynfi-group-audit-enterprise-2000 regen is the next deliverable — that's a cloud-H100 wall-clock + 3 GB tarball upload, not in scope for this PR. The v5.0 dataset README provenance note already pointed at this: "A v5.9-aware regeneration is on the roadmap and will arrive bundled with the upcoming group-audit-aware Method-A edge-list export."

Test plan

• Single-entity byte-identical: cargo test -p datasynth-runtime --test je_network_export (passes — same output)
• New unit tests: cargo test -p datasynth-runtime --lib je_network (4 passing)
• New unit test: cargo test -p datasynth-group --lib aggregate::je_network (1 passing)
• Extended e2e: cargo test -p datasynth-group --test aggregate_e2e (4 passing — incl. new v5.10 assertions)
• Mini-Nestlé end-to-end via the release CLI binary
• cargo clippy -p datasynth-runtime -p datasynth-group --tests clean
• cargo fmt --all

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