Improve Relativity load-file import (DAT/OPT robustness)

[markkerzner]

Summary

Improve FreeEed's existing Relativity load-file import. Import already ships — this is an enhancement, not a new feature: make importing an existing Relativity production more robust and complete.

Detail

• Ingest an existing Relativity production cleanly: DAT/OPT load files plus the associated natives/images and metadata.
• Goal (requester's framing): reliable enough that users already in the Relativity ecosystem can bring a production into FreeEed without manual fixup.

Why

Requested by a Scaia advisor (Matt Riggs), 2026-08-20. Better import lowers the on-ramp for users switching from / interoperating with Relativity.

Acceptance (draft)

• Import a representative Relativity DAT/OPT production and reproduce documents + metadata + natives/images faithfully.
• Surface clear errors on malformed/partial load files.

Source: FreeEedCRM product-feedback.md (2026-08-20 — Matt Riggs).