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.

config/okx_config.json

@@ -10,13 +10,14 @@
   },
   "data_collection": {
     "store_raw_data": true,
-    "health_check_interval": 30.0,
+    "health_check_interval": 120.0,
     "auto_restart": true,
     "buffer_size": 1000
   },
   "factory": {
     "use_factory_pattern": true,
     "default_data_types": ["trade", "orderbook"],
+    "default_timeframes": ["5s", "30s", "1m", "5m", "15m", "1h"],
     "batch_create": true
   },
   "trading_pairs": [
@@ -24,6 +25,7 @@
       "symbol": "BTC-USDT",
       "enabled": true,
       "data_types": ["trade", "orderbook"],
+      "timeframes": ["5s", "1m", "5m", "15m", "1h"],
       "channels": {
         "trades": "trades",
         "orderbook": "books5",
@@ -34,6 +36,7 @@
       "symbol": "ETH-USDT",
       "enabled": true,
       "data_types": ["trade", "orderbook"],
+      "timeframes": ["5s", "1m", "5m", "15m", "1h"],
       "channels": {
         "trades": "trades",
         "orderbook": "books5",