Add ISMS Listening Station with GSM cell detection

- Add spectrum monitoring via rtl_power with configurable presets
- Add OpenCelliD tower integration with Leaflet map display
- Add grgsm_scanner integration for passive GSM cell detection (alpha)
- Add rules engine for anomaly detection and findings
- Add baseline recording and comparison system
- Add setup.sh support for gr-gsm installation on Debian/Ubuntu

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

routes/__init__.py

@@ -15,6 +15,7 @@ def register_blueprints(app):
     from .correlation import correlation_bp
     from .listening_post import listening_post_bp
     from .tscm import tscm_bp, init_tscm_state
+    from .isms import isms_bp
 
     app.register_blueprint(pager_bp)
     app.register_blueprint(sensor_bp)
@@ -29,6 +30,7 @@ def register_blueprints(app):
     app.register_blueprint(correlation_bp)
     app.register_blueprint(listening_post_bp)
     app.register_blueprint(tscm_bp)
+    app.register_blueprint(isms_bp)
 
     # Initialize TSCM state with queue and lock from app
     import app as app_module