Extracts the 5 /api/claims endpoints from api.py into
cyclone.api_routers.claims:
GET /api/claims (paginated list)
GET /api/claims/stream (NDJSON live-tail)
GET /api/claims/{claim_id} (drawer detail)
GET /api/claims/{claim_id}/serialize-837 (X12 regen)
GET /api/claims/{claim_id}/line-reconciliation (per-line view)
Plus the two private projection helpers _claim_line_dict and
_svc_to_dict which are only used by line-reconciliation.
claims_stream is re-exported at the cyclone.api module level so
test_api_stream_live.py's direct import keeps working (same pattern
as the activity_stream re-export).
Route ordering preserved: /stream is declared before /{claim_id} in
the router source so FastAPI's first-match routing doesn't swallow
the literal 'stream' segment as a claim id.
api.py: 2201 -> 1841 (-360). Net diff: +432 / -389.
Pytest: 8 failed / 735 passed / 16 skipped — identical to baseline.
57/57 claims-targeted tests pass.
Live smoke: all 5 routes return expected status codes (200 for
list/stream, 404 for missing-claim detail/serialize/line-recon).
Tyler
ff43f90156