Run script to seed old POs, delivery notes and invoices for 3-way matching

Why

Documents (POs, delivery notes, invoices) created before the recent 3-way matching push are not being automatically matched. The matching system only runs on new documents. Historical documents need to be backfilled to enable matching.

What

Write and run a script/job to seed historical documents for 3-way matching across all tenants:

1. Match all POs first
2. Match all delivery notes
3. Match all invoices

This will enable 3-way matching for documents that were created before the automatic matching was deployed.

How

• Create a script that iterates through all tenants
• For each tenant, trigger the 3-way match process for existing documents
• Process in order: POs → Delivery Notes → Invoices
• Log results and any errors
• Run as a one-time migration job

Dependencies

Existing 3-way matching logic (COR-1229)

Acceptance Criteria

• Script successfully processes all tenants
• Historical POs are matched to delivery notes and invoices where applicable
• Historical delivery notes and invoices are matched to POs
• No duplicate matches created
• Script logs progress and completion status
• Can be run safely multiple times without creating duplicate matches