"""SQLite persistence layer: companies table, jobs table, dedup, company cache, CSV export.

Scaffold stub -- not implemented yet.
"""
# TODO (Stage 4): implement per CLAUDE.md "Stage 4 — Persist & export" and "Data model".
# Schema:
#   companies(company_key PK, name, website, career_url, first_seen)
#   jobs(job_id PK, company_key, linkedin_url, position_url, status, listed_at, first_seen)
# CSV export writes output/results.csv with columns: company_name, career_page_url, open_position_url
# (complete rows — status==position_found — sorted first; incomplete rows follow).