Update OKX configuration and aggregation logic for enhanced multi-timeframe support

- Increased health check interval from 30s to 120s in `okx_config.json`.
- Added support for additional timeframes (1s, 5s, 10s, 15s, 30s) in the aggregation logic across multiple components.
- Updated `CandleProcessingConfig` and `RealTimeCandleProcessor` to handle new timeframes.
- Enhanced validation and parsing functions to include new second-based timeframes.
- Updated database schema to support new timeframes in `schema_clean.sql`.
- Improved documentation to reflect changes in multi-timeframe aggregation capabilities.

database/schema_clean.sql

@@ -249,6 +249,11 @@ CREATE TABLE IF NOT EXISTS supported_timeframes (
 );
 
 INSERT INTO supported_timeframes (timeframe, description, minutes) VALUES
+('1s', '1 Second', 0.0167),
+('5s', '5 Seconds', 0.0833),
+('10s', '10 Seconds', 0.1667),
+('15s', '15 Seconds', 0.25),
+('30s', '30 Seconds', 0.5),
 ('1m', '1 Minute', 1),
 ('5m', '5 Minutes', 5),
 ('15m', '15 Minutes', 15),