Security:
- Serve generated profiles at /api/profile/<random-token> instead of
/api/profile/<sequential-int>. Profiles carry Ki/OPc, so the enumerable id
scheme allowed anyone on the WiFi to harvest all subscriber keys. Unknown
tokens return a plain 404 so they can't be probed.
Robustness:
- Open5GS/free5gc adapters use short MongoDB timeouts so an unreachable core
fails provisioning fast instead of blocking ~30s on the default.
- Profile cache is now a size-capped LRU (OrderedDict) to prevent unbounded
memory growth.
- load_config rejects empty/non-mapping YAML and validates network.op_key is a
16-byte hex string.
Tests: +25 (test_app.py API coverage, test_utils.py); 78 pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>