fix: resolve CLI service imports and update blockchain documentation

- Add proper package imports for coordinator-api services
- Fix 6 command modules to use app.services.* with clean path resolution
- Remove brittle path hacks and user-specific fallbacks
- Update blockchain-node README with operational status, API endpoints, and troubleshooting
- Add blockchain section to main README with quick launch and CLI examples
- Remove generated genesis.json from repository (should be ignored)

These changes fix import errors in surveillance, ai-trading, ai-surveillance,
advanced-analytics, regulatory, and enterprise-integration commands, and
document the now-operational Brother Chain (blockchain node).

Co-authored with sibling aitbc instance (coordination via Gitea).

cli/aitbc_cli/commands/advanced_analytics.py

@@ -10,29 +10,15 @@ import json
 from typing import Optional, List, Dict, Any
 from datetime import datetime, timedelta
 
-# Import advanced analytics with robust path resolution
+# Ensure coordinator-api src is on path for app.services imports
 import os
 import sys
-
-_services_path = os.environ.get('AITBC_SERVICES_PATH')
-if _services_path:
-    if os.path.isdir(_services_path):
-        if _services_path not in sys.path:
-            sys.path.insert(0, _services_path)
-    else:
-        print(f"Warning: AITBC_SERVICES_PATH set but not a directory: {_services_path}", file=sys.stderr)
-else:
-    _project_root = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..', '..'))
-    _computed_services = os.path.join(_project_root, 'apps', 'coordinator-api', 'src', 'app', 'services')
-    if os.path.isdir(_computed_services) and _computed_services not in sys.path:
-        sys.path.insert(0, _computed_services)
-    else:
-        _fallback = '/home/oib/windsurf/aitbc/apps/coordinator-api/src/app/services'
-        if os.path.isdir(_fallback) and _fallback not in sys.path:
-            sys.path.insert(0, _fallback)
+_src_path = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..', '..', 'apps', 'coordinator-api', 'src'))
+if _src_path not in sys.path:
+    sys.path.insert(0, _src_path)
 
 try:
-    from advanced_analytics import (
+    from app.services.advanced_analytics import (
         start_analytics_monitoring, stop_analytics_monitoring, get_dashboard_data,
         create_analytics_alert, get_analytics_summary, advanced_analytics,
         MetricType, Timeframe
@@ -43,8 +29,8 @@ except ImportError as e:
 
     def _missing(*args, **kwargs):
         raise ImportError(
-            f"Required service module 'advanced_analytics' could not be imported: {_import_error}. "
-            "Ensure coordinator-api dependencies are installed or set AITBC_SERVICES_PATH."
+            f"Required service module 'app.services.advanced_analytics' could not be imported: {_import_error}. "
+            "Ensure coordinator-api dependencies are installed and the source directory is accessible."
         )
     start_analytics_monitoring = stop_analytics_monitoring = get_dashboard_data = _missing
     create_analytics_alert = get_analytics_summary = _missing