docs: cleanup stale documentation and fix outdated references

- Delete README-ORACLE-MODES.md (references Docker infra that doesn't exist)
- Delete .claude/HANDOFF.md (completed CI/CD session handoff, no longer needed)
- Fix api/README.md: correct run command to ./start.sh, update test commands
  to use ./test.sh instead of deleted test_app_basic.py/test_integration.py
- Fix scripts/HANDOFF_MAPPING.md: mark deleted scripts as removed
- Remove dead README-ORACLE-MODES.md link from README doc table

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/HANDOFF_MAPPING.md

@@ -72,10 +72,9 @@ Cand o comanda are produse complet diferite fata de factura, algoritmul forteaza
 - Exemplu: "Lavazza Crema E Aroma Cafea Boabe 1 Kg" vs "LAVAZZA BBE CREMA E AROMA"
 - Ar putea fi mai precis decat match pe pret, mai ales cand preturile coincid accidental
 
-### Tools utile deja existente:
-- `scripts/compare_order.py <order_nr> <fact_nr>` — comparare detaliata o comanda vs o factura
-- `scripts/fetch_one_order.py <order_nr>` — fetch JSON complet din GoMag API
-- `scripts/match_all.py` — matching bulk (de refacut cu strategie noua)
+### Tools (nota: scripturile de matching au fost sterse din repo)
+Scripturile `match_all.py`, `compare_order.py`, `fetch_one_order.py` au fost eliminate.
+Strategia de matching descrisa mai sus ramane valida ca referinta conceptuala.
 
 ## Structura Oracle relevanta