fix(SEC-6): reject empty-string ADMIN_SECRET -- empty string was falsy and bypassed authentication check

fix(H-04): enforce ADMIN_SECRET even when DEBUG_MODE=true -- prevents production DB wipe via accidental debug flag

fix(BUG-6,NEW-A6): add X-Admin-Secret auth on /admin/seed and /admin/pipeline; add threading.Lock for pipeline race condition

fix(admin): BUG-21/22/30 — driver reuse, bond key, 7 missing scrapers

fix(BUG-02/15/16): pipeline loads all 13 scrapers; reuses driver; auto-detects loaders

fix(admin): seed now creates relationships, bump version to 0.29.0

fix(config+admin+main): 4 bugs resolved

feat: Procurement DNA + Cartel Detection + full pipeline fix

fix(data): add sample data seed — politicians, companies, contracts, audit reports