BOMs — mirror + version diff

Read-only mirror of the ERP's imported, versioned BOM tables (ADR-001 D2). IECL never authors BOM lines — it diffs versions and coordinates the change.

Pulls versioned BOM + PO/WO/MR and opens change cases for new versions.
ProjectVersionLinesImportedDiff
No BOM versions mirrored yet — click ingest.