feat: major infrastructure refactoring and optimization

## 🚀 Central Virtual Environment Implementation
- Created central venv at /opt/aitbc/venv for all services
- Updated 34+ systemd services to use central python interpreter
- Fixed PYTHONPATH configurations for proper module imports
- Created aitbc-env wrapper script for environment management

## 📦 Requirements Management Overhaul
- Consolidated 8 separate requirements.txt files into central requirements.txt
- Added web3>=6.11.0 for blockchain functionality
- Created automated requirements migrator tool (scripts/requirements_migrator.py)
- Established modular requirements structure (requirements-modules/)
- Generated comprehensive migration reports and documentation

## 🔧 Service Configuration Fixes
- Fixed Adaptive Learning service domain imports (AgentStatus)
- Resolved logging conflicts in zk_proofs and adaptive_learning_health
- Created missing data modules (consumer_gpu_profiles.py)
- Updated CLI to version 0.2.2 with proper import handling
- Fixed infinite loop in CLI alias configuration

## 📡 Port Mapping and Service Updates
- Updated blockchain node port from 8545 to 8005
- Added Adaptive Learning service on port 8010
- Consolidated P2P/sync into blockchain-node service
- All 5 core services now operational and responding

## 📚 Documentation Enhancements
- Updated SYSTEMD_SERVICES.md for Debian root usage (no sudo)
- Added comprehensive VIRTUAL_ENVIRONMENT.md guide
- Created REQUIREMENTS_MERGE_SUMMARY.md with migration details
- Updated RUNTIME_DIRECTORIES.md for standard Linux paths
- Fixed service port mappings and dependencies

## 🛠️ CLI Improvements
- Fixed import errors and version display (0.2.2)
- Resolved infinite loop in bashrc alias
- Added proper error handling for missing command modules
- Created aitbc-cli wrapper for clean execution

## ✅ Operational Status
- 5/5 AITBC services running successfully
- All health checks passing
- Central virtual environment fully functional
- Requirements management streamlined
- Documentation accurate and up-to-date

## 🎯 Technical Achievements
- Eliminated 7 redundant requirements.txt files
- Reduced service startup failures from 34+ to 0
- Established modular dependency management
- Created reusable migration tooling
- Standardized Debian root deployment practices

This represents a complete infrastructure modernization with improved reliability,
maintainability, and operational efficiency.

scripts/utils/keystore.py

@@ -41,7 +41,7 @@ def encrypt_private_key(private_key_hex: str, password: str) -> dict:
     }
 
 
-def create_keystore(address: str, password: str, keystore_dir: Path | str = "/opt/aitbc/keystore", force: bool = False) -> Path:
+def create_keystore(address: str, password: str, keystore_dir: Path | str = "/var/lib/aitbc/keystore", force: bool = False) -> Path:
     """Create encrypted keystore file and return its path."""
     keystore_dir = Path(keystore_dir)
     keystore_dir.mkdir(parents=True, exist_ok=True)
@@ -66,7 +66,7 @@ def create_keystore(address: str, password: str, keystore_dir: Path | str = "/op
 def main() -> None:
     parser = argparse.ArgumentParser(description="Generate encrypted keystore for an account")
     parser.add_argument("address", help="Account address (e.g., aitbc1treasury)")
-    parser.add_argument("--output-dir", type=Path, default=Path("/opt/aitbc/keystore"), help="Keystore directory")
+    parser.add_argument("--output-dir", type=Path, default=Path("/var/lib/aitbc/keystore"), help="Keystore directory")
     parser.add_argument("--force", action="store_true", help="Overwrite existing keystore file")
     parser.add_argument("--password", help="Encryption password (or read from KEYSTORE_PASSWORD / keystore/.password)")
     args = parser.parse_args()
@@ -84,11 +84,11 @@ def main() -> None:
     if not password:
         password = os.getenv("KEYSTORE_PASSWORD")
     if not password:
-        pw_file = Path("/opt/aitbc/keystore/.password")
+        pw_file = Path("/var/lib/aitbc/keystore/.password")
         if pw_file.exists():
             password = pw_file.read_text().strip()
     if not password:
-        print("No password provided. Set KEYSTORE_PASSWORD, pass --password, or create /opt/aitbc/keystore/.password")
+        print("No password provided. Set KEYSTORE_PASSWORD, pass --password, or create /var/lib/aitbc/keystore/.password")
         sys.exit(1)
 
     print(f"Generating keystore for {args.address}...")