fix: correct transaction field mapping and standardize genesis path resolution in PoA consensus

🔧 Transaction Field Mapping:
• Change sender field from "sender" to "from" in transaction parsing
• Change recipient field from nested "payload.to" to direct "to"
• Change value field from nested "payload.amount" to direct "amount"
• Align transaction structure with RPC endpoint format

📁 Genesis File Path Resolution:
• Use standardized /var/lib/aitbc/data/{chain_id}/genesis.json path
• Remove

scripts/workflow/03_follower_node_setup.sh

@@ -23,7 +23,7 @@ mkdir -p /var/lib/aitbc/data /var/lib/aitbc/keystore /etc/aitbc /var/log/aitbc
 ls -la /var/lib/aitbc/ || echo "Creating /var/lib/aitbc/ structure..."
 
 # Copy and adapt central .env for aitbc (follower node)
-cp /etc/aitbc/blockchain.env /etc/aitbc/blockchain.env.aitbc.backup 2>/dev/null || true
+cp /etc/aitbc/.env /etc/aitbc/.env.aitbc.backup 2>/dev/null || true
 
 # Update .env for aitbc follower node configuration
 echo "4. Updating environment configuration..."