Consolidate service scripts into apps directories

- Move blockchain scripts to apps/blockchain-node/scripts/
- Move marketplace scripts to apps/marketplace/scripts/
- Move agent daemon to apps/agent-coordinator/scripts/
- Move monitor to apps/monitor/
- Update systemd service files to point to new locations
- Update internal path references in moved scripts
- Remove empty /opt/aitbc/services directory

scripts/deployment/deploy/.env.deploy.example

@@ -24,7 +24,7 @@ SERVICE_STARTUP_TIMEOUT=60
 # === EXAMPLE VALUES ===
 # CONTAINER_NAME="aitbc"
 # CONTAINER_IP="192.168.1.100"
-# PROJECT_DIR="/home/user/aitbc"
+# PROJECT_DIR="/opt/aitbc"
 # SSH_ALIAS="user@container-ip"
 # SSH_KEY_PATH="/home/user/.ssh/id_rsa"