The collector's `attacker.session.ended` envelope carries
`attacker_uuid: null` and `attacker_ip: <ip>` because the collector
doesn't talk to the DB. The TTP worker passed that null straight
through, and `TTPTag.__init__` raised the documented invariant:
ValueError: ttp_tag requires at least one of attacker_uuid /
identity_uuid; both NULL is not a valid anchor.
The worker now resolves `attacker_uuid` from `attacker_ip` via
`BaseRepository.get_attacker_uuid_by_ip` before fanning out the
event. When the IP isn't in the DB yet (profiler hasn't ingested
the row), the event is dropped with one log line — better than
exploding mid-tag.
- New `get_attacker_uuid_by_ip(ip) -> str | None` on the repo
(BaseRepository abstract + AttackersCoreMixin impl).
- `_resolve_attacker_uuid` helper in `decnet/ttp/worker.py` runs
before `_build_events`. Short-circuits when the payload already
has either anchor; drops the event when neither anchor is
resolvable.
- Tests pin: short-circuit on existing uuid/identity, repo lookup,
drop on unknown IP, drop on "Unknown" sentinel, drop on
no-anchor payload, drop on repo failure.
anti
c4e29e3bf9