Research/ream250 bom to kb

[changbowei]

Summary

• Adds bilingual reAM250 BOM-to-KB closure abstraction planning documents.
• Updates reAM250 BOM row research outputs for KB ingestion.
• Clarifies the lunarized closure abstraction workflow, including vacuum pruning, decomposition timing, process
  substitution, 2x merge rule, precision guardrails, and material-preserving item naming.

Notes

• This treats the commercial reAM250 BOM as research evidence, not as a direct KB design target.
• The abstraction strategy prioritizes closure analysis: material diversity, process diversity, provider-machine
  diversity, and process flexibility.
• Vacuum-related pruning is documented as a pending discussion point before KB import.

Testing

• Not run; documentation and research-result updates only.
• Ran staged diff whitespace check before committing.