feat: implement NotionWriter database insertion and wire it with HyperliquidMonitor

src/structs.rs

@@ -20,7 +20,22 @@ pub struct PositionTradeEvent {
     pub sz: String,   // Trade size as string
     pub time: u64,    // Epoch timestamp in milliseconds
     pub tid: u64,     // Unique trade ID
+    pub oid: u64,     // Hyperliquid Order ID
     pub action: TradeAction,
     pub start_pos: String, // Position size before the trade
     pub end_pos: String,   // Position size after the trade
 }
+
+/// Represents the structured row data formatted for Notion database insertion.
+#[derive(Debug, Clone)]
+pub struct NotionRowData {
+    pub symbol: String,       // e.g., "BTCUSDC"
+    pub quantity: String,     // e.g., "0.02484"
+    pub filled_price: String, // e.g., "72543"
+    pub direction: String,    // "Long" or "Short"
+    pub exchange: String,     // e.g., "Hyperliquid"
+    pub date_time: String,    // Format: "YYYY/MM/DD HH:MM"
+    pub time: u64,            // Unix timestamp in milliseconds
+    pub order_id: u64,        // Hyperliquid order ID (oid)
+    pub check: bool,          // false
+}