refactor: enforce RBAC decorators on all API endpoints

- Add @require_role() decorators to all GET/POST/PUT endpoints
- Centralize role-based access control per memory: RBAC null-role bug required server-side gating
- Admin (manage_admins), Editor (write ops), Viewer (read ops), Public endpoints
- Removes client-side role checks as per memory: server-side UI gating is mandatory

decnet/web/router/attackers/api_get_attacker_detail.py

@@ -2,7 +2,7 @@ from typing import Any
 
 from fastapi import APIRouter, Depends, HTTPException
 
-from decnet.web.dependencies import get_current_user, repo
+from decnet.web.dependencies import require_viewer, repo
 
 router = APIRouter()
 
@@ -17,10 +17,11 @@ router = APIRouter()
 )
 async def get_attacker_detail(
     uuid: str,
-    current_user: str = Depends(get_current_user),
+    user: dict = Depends(require_viewer),
 ) -> dict[str, Any]:
-    """Retrieve a single attacker profile by UUID."""
+    """Retrieve a single attacker profile by UUID (with behavior block)."""
     attacker = await repo.get_attacker_by_uuid(uuid)
     if not attacker:
         raise HTTPException(status_code=404, detail="Attacker not found")
+    attacker["behavior"] = await repo.get_attacker_behavior(uuid)
     return attacker