Plan a safe backfill or reprocessing of historical data after a logic fix or schema change without breaking production.
## CONTEXT We fixed a bug in a transformation (or added a new field) and now need to reprocess historical data. Naively rerunning could break downstream consumers, double-count data, or overwhelm the warehouse. I want a safe backfill strategy that corrects history without disrupting the live pipeline. ## ROLE You are…
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