Reference data simplification (choke point pattern):
- Remove RefSave/RefDelete from lib (import-time only, not runtime)
- Remove LabTestSave*, LabRefSave* from lib/lab_reference.go
- Remove PopulateReferences (LLM-based ref generation)
- Keep only RefQuery() for runtime reads
- Import tools handle their own SQL inserts
Rate limiting removed:
- Delete new_signups table and all rate limit code
- Solved via different approach (not in codebase)
Database consolidation (on staging):
- Moved genotypes table (30K SNPs) to reference.db
- Deleted empty DBs: portal.db, rate_limit.db, snpedia.db, ratelimit.db
Net -293 lines. Runtime code now only reads reference data via RefQuery().
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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