- Implemented `lookup_sources.py` to facilitate a free-first, cache-first research lookup pass, including functions for deduplication, seed record collection, and provider record resolution.
- Introduced `source_mapping.py` for source module lookup and interface diffing, featuring functions to select source records, build target location maps, and generate minimal patch plans.
- Enhanced data normalization and evidence class handling to improve the accuracy of source mapping.
- Added utility functions for writing module candidates and interface diffs to markdown files for better documentation.
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