Splits the 459-line credentials.py into two submixins plus a composing
CredentialsMixin in credentials/__init__.py:
_core.py (~190) Credential capture: upsert, list, filters,
per-attacker / per-secret reads, attacker_uuid
backfill
reuse.py (~270) CredentialReuse correlation: upsert, candidate
mining, list/get + the _enrich_with_secret helper
that lifts the printable/b64 from underlying rows
_merge_unique stays with reuse.py (its only caller).
_enrich_with_secret stays with reuse.py — it's an internal helper of
list_credential_reuses / get_credential_reuse_by_id, never called
from the capture path.
anti
15b2e7ba5c