refactor: consolidate blockchain explorer into single app and update backup ignore patterns

- Remove standalone explorer-web app (README, HTML, package files)
- Add /web endpoint to blockchain-explorer for web interface access
- Update .gitignore to exclude application backup archives (*.tar.gz, *.zip)
- Add backup documentation files to .gitignore (BACKUP_INDEX.md, README.md)
- Consolidate explorer functionality into main blockchain-explorer application

apps/exchange/scripts/seed_market.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+"""Seed initial market price for the exchange"""
+
+import sqlite3
+from datetime import datetime
+
+def seed_initial_price():
+    """Create initial trades to establish market price"""
+    
+    conn = sqlite3.connect('exchange.db')
+    cursor = conn.cursor()
+    
+    # Create some initial trades at different price points
+    initial_trades = [
+        (1000, 0.00001),   # 1000 AITBC at 0.00001 BTC each
+        (500, 0.0000105),  # 500 AITBC at slightly higher
+        (750, 0.0000095),  # 750 AITBC at slightly lower
+        (2000, 0.00001),   # 2000 AITBC at base price
+        (1500, 0.000011),  # 1500 AITBC at higher price
+    ]
+    
+    for amount, price in initial_trades:
+        total = amount * price
+        cursor.execute('''
+            INSERT INTO trades (amount, price, total, created_at)
+            VALUES (?, ?, ?, ?)
+        ''', (amount, price, total, datetime.utcnow()))
+    
+    # Also create some initial orders for liquidity
+    initial_orders = [
+        ('BUY', 5000, 0.0000095),   # Buy order
+        ('BUY', 3000, 0.00001),     # Buy order
+        ('SELL', 2000, 0.0000105),  # Sell order
+        ('SELL', 4000, 0.000011),   # Sell order
+    ]
+    
+    for order_type, amount, price in initial_orders:
+        total = amount * price
+        cursor.execute('''
+            INSERT INTO orders (order_type, amount, price, total, remaining, user_address)
+            VALUES (?, ?, ?, ?, ?, ?)
+        ''', (order_type, amount, price, total, amount, 'aitbcexchange00000000000000000000000000000000'))
+    
+    conn.commit()
+    conn.close()
+    
+    print("✅ Seeded initial market data:")
+    print(f"   - Created {len(initial_trades)} historical trades")
+    print(f"   - Created {len(initial_orders)} liquidity orders")
+    print(f"   - Initial price range: 0.0000095 - 0.000011 BTC")
+    print("   The exchange should now show real prices!")
+
+if __name__ == "__main__":
+    seed_initial_price()