feat: 添加 Paradex 适配器支持，更新环境变量配置和适配器构建逻辑

.env.example

@@ -1,5 +1,5 @@
 # Exchange selection
-EXCHANGE=aster                       # Pick aster (default) or grvt
+EXCHANGE=aster                       # Pick aster (default) or grvt/lighter/backpack/paradex
 
 # Aster API credentials
 ASTER_API_KEY=
@@ -77,4 +77,26 @@ BACKPACK_SANDBOX=false
 BACKPACK_SYMBOL=BTC_USD_PERP
 
 # Enable verbose adapter logging: set to "1" or "true"
-BACKPACK_DEBUG=false
+BACKPACK_DEBUG=false
+
+# Paradex exchange configuration
+# Provide the EVM private key & wallet address for onboarded accounts.
+# When EXCHANGE=paradex these values are used automatically.
+
+PARADEX_PRIVATE_KEY=
+PARADEX_WALLET_ADDRESS=
+
+# Symbol defaults to TRADE_SYMBOL if omitted. Use ccxt unified format like BTC-USD-PERP.
+# PARADEX_SYMBOL=BTC-USD-PERP
+
+# Enable testnet endpoints by setting to "true"; defaults to false (mainnet).
+# PARADEX_SANDBOX=false
+
+# Force disabling ccxt.pro websocket usage by setting to "false" (pro is preferred when installed).
+# PARADEX_USE_PRO=true
+
+# Optional reconnect delay override (milliseconds, e.g., 2000). Leave blank for default.
+# PARADEX_RECONNECT_DELAY_MS=
+
+# Enable verbose adapter logging: set to "1" or "true"
+# PARADEX_DEBUG=false