Fifth and final commit of the identity-resolution substrate. Unblocks
fixture 2 (vpn_hopping) by making the synthetic factory match
production shape: an actor rotating across N IPs produces N
SyntheticAttacker rows that share fingerprints + truth_identity_id but
differ on ip / asn — exactly the shape the future clusterer needs to
recover via JA3/HASSH match.
Factory:
* SyntheticSession + SyntheticAttacker gain truth_identity_id field.
* DSL: ip_pool: rotating + rotation_count: N produces N observation
rows per actor. Optional rotation_asns: [...] cycles ASN per row;
defaults to the actor's primary asn.
* Sessions distribute round-robin across the actor's rotated rows.
* Noise scanners get truth_identity_id == truth_actor_id ==
truth_campaign_id (each is its own singleton at every level).
* GeneratedCorpus.truth_labels(level=) accepts "campaign" (default,
back-compat), "identity", or "actor" — picks the oracle the
metric harness scores against.
Harness:
* assert_fixture_bounds gains truth_level kwarg (default "campaign")
so identity-resolution fixtures can score against truth_identity_id
without churning the campaign-clustering test files.
Tests: 9 new (rotation_count emits N rows, shared identity +
fingerprints, distinct IPs, rotation_asns distribution + cycling,
round-robin session distribution, identity-level truth labels,
sticky default unchanged, sessions inherit identity label).
598 tests green across clustering / factories / db / web / bus /
profiler / correlation.
anti
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