ACCEPTANCE CRITERIA (6/6)

☑ 1. `config/thresholds.json` contains threshold definitions for: usd_brl, petroleo_brent, petroleo_wti, selic, diesel_rs, ipca, natural_gas -- each with warning/critical absolute and delta_pct values, direction, and unit

☑ 2. `config/indicators.json` contains BCB section (6 series: selic/432, usd_brl/1, ipca/433, igpm/189, pib/4380, industrial_production/21859) and FRED section (5 series: fed_funds_rate/FEDFUNDS, us_cpi/CPIAUCSL, us_gdp/GDP, us_unemployment/UNRATE, dxy_index/DTWEXBGS) with base URLs and rate limit configs

☑ 3. `config/commodities.json` contains 5 commodities (petroleo_wti/WTI, petroleo_brent/BRENT, natural_gas/NATURAL_GAS, copper/COPPER, aluminum/ALUMINUM) with Alpha Vantage function names, units, and rate limit config

☑ 4. `config/feeds.json` contains 6 RSS feeds (4 PT-BR Google News + 2 EN Google News) with categories, URLs, enabled flags, and max_items_per_feed/max_age_hours settings

☑ 5. All config files are valid JSON (parseable by `JSON.parse`)

☑ 6. Existing YAML config files (`alert-thresholds.yaml`, `propek-impact-matrix.yaml`) are NOT modified