feat: migrate configuration to system location

✅ Configuration Migration
- Moved configs from /opt/aitbc/config to /etc/aitbc
- Moved production .env to /etc/aitbc/production.env
- Updated all code references to use /etc/aitbc
- Updated systemd services to use /etc/aitbc
- Removed config files from git tracking
- Updated .gitignore for config files

✅ System Compliance
- All configuration now in /etc/aitbc (FHS compliant)
- No configuration files in repository
- Proper system-wide configuration location
- Security-sensitive files in system location

✅ Service Updates
- Production services use /etc/aitbc/production.env
- SystemD services use /etc/aitbc/.env
- All code references updated to system paths
- Services restart and test successfully

🚀 AITBC configuration now follows proper system standards!

systemd/aitbc-blockchain-node.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-blockchain-p2p.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-blockchain-rpc.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-blockchain-sync.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-coordinator-api.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-cross-chain-reputation.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-edge-monitoring-aitbc1-edge-secondary.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-exchange-api.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-explorer.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-learning.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-marketplace.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-miner-dashboard.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-modality-optimization.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-multimodal.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-node.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-openclaw.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env

systemd/aitbc-wallet.service.d/10-central-env.conf

@@ -1,2 +1,2 @@
 [Service]
-EnvironmentFile=/opt/aitbc/.env
+EnvironmentFile=/etc/aitbc/.env