data: Olist + GitHub Archive como datasets del módulo

Datasets:
- data/raw/olist/: 3000 órdenes Olist (ene-feb 2018), 8 tablas relacionales
- data/raw/events/github_events.jsonl: 2000 eventos GitHub Archive (2024-01-15)

Schema:
- sql/001_schema.sql: 8 tablas con FK (customers, sellers, products, orders,
  order_items, order_payments, order_reviews, category_translations)

Scripts:
- scripts/load_postgres.py: carga las 8 tablas desde CSVs con psycopg2
- scripts/download_data.py: descarga datasets completos (Kaggle + gharchive.org)

Atribución: CREDITS.md

Author: maxflorentin

CREDITS.md

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+# Credits & Data Sources
+
+## Olist Brazilian E-Commerce Dataset
+
+- **Source:** https://www.kaggle.com/datasets/olistbr/brazilian-ecommerce
+- **Provider:** Olist (https://olist.com)
+- **License:** Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
+  https://creativecommons.org/licenses/by-nc-sa/4.0/
+- **Use in this repo:** Sample of 3,000 orders (Jan–Feb 2018) used for educational labs.
+  Full dataset not included. Run `scripts/download_data.py` to download it.
+
+## GitHub Archive
+
+- **Source:** https://www.gharchive.org
+- **Provider:** Ilya Grigorik / GitHub Archive project
+- **License:** Creative Commons Attribution 4.0 International (CC BY 4.0)
+  https://creativecommons.org/licenses/by/4.0/
+- **GitHub Event data license:** https://docs.github.com/en/site-policy/github-terms/github-terms-of-service
+- **Use in this repo:** Sample of 2,000 public events (Jan 15 2024, 14:00 UTC) used for
+  streaming and queue labs. Run `scripts/download_data.py` to download more data.
+
+## Notes
+
+All data in `data/raw/` is used strictly for educational, non-commercial purposes.
+No personally identifiable information (PII) is included beyond what is already
+anonymized in the original public datasets.

data/raw/events/github_events.jsonl

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+product_category_name,product_category_name_english
+beleza_saude,health_beauty
+informatica_acessorios,computers_accessories
+automotivo,auto
+cama_mesa_banho,bed_bath_table
+moveis_decoracao,furniture_decor
+esporte_lazer,sports_leisure
+perfumaria,perfumery
+utilidades_domesticas,housewares
+telefonia,telephony
+relogios_presentes,watches_gifts
+alimentos_bebidas,food_drink
+bebes,baby
+papelaria,stationery
+tablets_impressao_imagem,tablets_printing_image
+brinquedos,toys
+telefonia_fixa,fixed_telephony
+ferramentas_jardim,garden_tools
+fashion_bolsas_e_acessorios,fashion_bags_accessories
+eletroportateis,small_appliances
+consoles_games,consoles_games
+audio,audio
+fashion_calcados,fashion_shoes
+cool_stuff,cool_stuff
+malas_acessorios,luggage_accessories
+climatizacao,air_conditioning
+construcao_ferramentas_construcao,construction_tools_construction
+moveis_cozinha_area_de_servico_jantar_e_jardim,kitchen_dining_laundry_garden_furniture
+construcao_ferramentas_jardim,costruction_tools_garden
+fashion_roupa_masculina,fashion_male_clothing
+pet_shop,pet_shop
+moveis_escritorio,office_furniture
+market_place,market_place
+eletronicos,electronics
+eletrodomesticos,home_appliances
+artigos_de_festas,party_supplies
+casa_conforto,home_confort
+construcao_ferramentas_ferramentas,costruction_tools_tools
+agro_industria_e_comercio,agro_industry_and_commerce
+moveis_colchao_e_estofado,furniture_mattress_and_upholstery
+livros_tecnicos,books_technical
+casa_construcao,home_construction
+instrumentos_musicais,musical_instruments
+moveis_sala,furniture_living_room
+construcao_ferramentas_iluminacao,construction_tools_lights
+industria_comercio_e_negocios,industry_commerce_and_business
+alimentos,food
+artes,art
+moveis_quarto,furniture_bedroom
+livros_interesse_geral,books_general_interest
+construcao_ferramentas_seguranca,construction_tools_safety
+fashion_underwear_e_moda_praia,fashion_underwear_beach
+fashion_esporte,fashion_sport
+sinalizacao_e_seguranca,signaling_and_security
+pcs,computers
+artigos_de_natal,christmas_supplies
+fashion_roupa_feminina,fashio_female_clothing
+eletrodomesticos_2,home_appliances_2
+livros_importados,books_imported
+bebidas,drinks
+cine_foto,cine_photo
+la_cuisine,la_cuisine
+musica,music
+casa_conforto_2,home_comfort_2
+portateis_casa_forno_e_cafe,small_appliances_home_oven_and_coffee
+cds_dvds_musicais,cds_dvds_musicals
+dvds_blu_ray,dvds_blu_ray
+flores,flowers
+artes_e_artesanato,arts_and_craftmanship
+fraldas_higiene,diapers_and_hygiene
+fashion_roupa_infanto_juvenil,fashion_childrens_clothes
+seguros_e_servicos,security_and_services