Stage371: Real Timestamp First Successful Receipt Gate
with Stage370 Safety Brake Binding

Decision: first_receipt_pending
Receipt Status: not_generated
Previous Hash: af4c98c8e7a22a3d01565c2b9544f57f060e940355172754c537aac0ff896225
Result SHA256: 581d2354f9aad758e551968634a79695cdd64aec2298f443e1376b646700c54f

Meaning:
Stage371 can generate the first real successful timestamp receipt only after Stage370 safety brake tests pass.
It requires exit_code=0, matching verified_target_hash, and metadata-only receipt evidence.
Stage371 does not final-accept timestamp_verified; final acceptance belongs to the next gate.