fix: add fixed marketplace offers endpoint to avoid AttributeError

Marketplace Offers Router Enhancement:
✅ NEW ENDPOINT: GET /offers for listing all marketplace offers
- Added fixed version to avoid AttributeError from GlobalMarketplaceService
- Uses direct database query with SQLModel select
- Safely extracts offer attributes with fallback defaults
- Returns structured offer data with GPU specs and metadata

✅ ENDPOINT FEATURES:
🔧 Direct Query: Bypasses service layer to avoid attribute

cli/integrate_miner_cli.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+# AITBC Miner Management Integration Script
+# This script integrates the miner management functionality with the main AITBC CLI
+
+echo "🤖 AITBC Miner Management Integration"
+echo "=================================="
+
+# Check if miner CLI exists
+MINER_CLI="/opt/aitbc/cli/miner_cli.py"
+if [ ! -f "$MINER_CLI" ]; then
+    echo "❌ Error: Miner CLI not found at $MINER_CLI"
+    exit 1
+fi
+
+# Create a symlink in the main CLI directory
+MAIN_CLI_DIR="/opt/aitbc"
+MINER_CMD="$MAIN_CLI_DIR/aitbc-miner"
+
+if [ ! -L "$MINER_CMD" ]; then
+    echo "🔗 Creating symlink: $MINER_CMD -> $MINER_CLI"
+    ln -s "$MINER_CLI" "$MINER_CMD"
+    chmod +x "$MINER_CMD"
+fi
+
+# Test the integration
+echo "🧪 Testing miner CLI integration..."
+echo ""
+
+# Test help
+echo "📋 Testing help command:"
+$MINER_CMD --help | head -10
+echo ""
+
+# Test registration (with test data)
+echo "📝 Testing registration command:"
+$MINER_CMD register --miner-id integration-test --wallet ait113e1941cb60f3bb945ec9d412527b6048b73eb2d --gpu-memory 2048 --models qwen3:8b --pricing 0.45 --region integration-test 2>/dev/null | grep "Status:"
+echo ""
+
+echo "✅ Miner CLI integration completed!"
+echo ""
+echo "🚀 Usage Examples:"
+echo "  $MINER_CMD register --miner-id my-miner --wallet <wallet> --gpu-memory 8192 --models qwen3:8b --pricing 0.50"
+echo "  $MINER_CMD status --miner-id my-miner"
+echo "  $MINER_CMD poll --miner-id my-miner"
+echo "  $MINER_CMD heartbeat --miner-id my-miner"
+echo "  $MINER_CMD result --job-id <job-id> --miner-id my-miner --result 'Job completed'"
+echo "  $MINER_CMD marketplace list"
+echo "  $MINER_CMD marketplace create --miner-id my-miner --price 0.75"
+echo ""
+echo "📚 All miner management commands are now available via: $MINER_CMD"