06/03 Optimize app

app/__init__.py

@@ -78,6 +78,19 @@ def create_app(config_name=None):
     csrf.init_app(app)
     limiter.init_app(app)
 
+    # ── Sentry (optional) ────────────────────────────────────────────────────
+    sentry_dsn = app.config.get('SENTRY_DSN', '')
+    if sentry_dsn:
+        import sentry_sdk
+        from sentry_sdk.integrations.flask import FlaskIntegration
+        sentry_sdk.init(
+            dsn=sentry_dsn,
+            integrations=[FlaskIntegration()],
+            traces_sample_rate=0.1,   # 10 % of requests traced
+            send_default_pii=False,   # no personal data in error reports
+        )
+        logging.getLogger('app').info('Sentry initialised')
+
     from app.routes.auth import auth_bp
     from app.routes.dashboard import dashboard_bp
     from app.routes.accounts import accounts_bp