Covers three things:
1. _build_per / _build_sbr call-site fixes so the serializer always
emits PER-02/03/04 + SBR-09 (Edifabric rejects the current shape).
2. New cyclone.edifabric HTTP client wrapping the two-step
/x12/read -> /x12/validate flow against api.edination.com.
3. Pre-upload gate inside resubmit-rejected-claims so an
Edifabric-invalid file can't reach Gainwell.
Public eval API key 3ecf6b1c5cf34bd797a5f4c57951a1cf for dev.
Production is operator-supplied via cyclone secrets set
edifabric.api_key <paid-key>.
Nora