feat(phases): implement webhooks (6.1), email (7.1), user preferences (7.2)

- Phase 6.1: WebhookConfig model, CRUD router (/api/v1/webhooks, admin-only),
  dispatch_webhook() with HMAC signing; integrated into test validation,
  campaign completion, and MITRE sync job
- Phase 7.1: SMTP email service with send_test_validated_email,
  send_campaign_completed_email, send_new_mitre_techniques_email;
  notify_role_with_email() added to notification_service
- Phase 7.2: notification_preferences and jira_account_id on User model;
  PATCH /users/me/preferences endpoint; Alembic migrations b031phase6 and b032phase7

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/routers/users.py

@@ -9,7 +9,8 @@ from app.database import get_db
 from app.dependencies.auth import require_role
 from app.domain.unit_of_work import UnitOfWork
 from app.models.user import User
-from app.schemas.user import UserCreate, UserUpdate, UserOut
+from app.dependencies.auth import get_current_user
+from app.schemas.user import UserCreate, UserUpdate, UserOut, UserPreferencesUpdate
 from app.services.audit_service import log_action
 from app.services.user_service import (
     create_user,
@@ -21,6 +22,26 @@ from app.services.user_service import (
 router = APIRouter(prefix="/users", tags=["users"])
 
 
+# ---------------------------------------------------------------------------
+# PATCH /users/me/preferences  —  update current user preferences
+# ---------------------------------------------------------------------------
+
+
+@router.patch("/me/preferences", response_model=UserOut)
+def update_my_preferences(
+    payload: UserPreferencesUpdate,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+):
+    """Update the current user's notification preferences and Jira account ID."""
+    update_data = payload.model_dump(exclude_unset=True)
+    for field, value in update_data.items():
+        setattr(current_user, field, value)
+    db.commit()
+    db.refresh(current_user)
+    return current_user
+
+
 # ---------------------------------------------------------------------------
 # GET /users  —  list all users
 # ---------------------------------------------------------------------------