PF-VA: upstream reward-binding schemas for pf-core-v0.7.0

[fraware]

Companion ticket: upstream mirrored reward schemas

Source: PF-Core pf-core-v0.7.0 (commit 0330172b09399029fb6bd0f70c5b411039dd9c36)
Spec: https://github.com/SentinelOps-CI/provability-fabric-core/blob/pf-core-v0.7.0/docs/pf-core/pf-va-pr-artifacts/pcs-core-reward-schemas-pr-spec.md
Pins: https://github.com/SentinelOps-CI/provability-fabric-core/blob/pf-core-v0.7.0/adapters/pcs/schemas/SCHEMA_PINS.json

Goal

Upstream the mirrored PCS schemas (reward_evidence_envelope, verifier_profile, environment_profile, verification_result, authority_record) so pcs-core remains the portable evidence standard. PF-Core must not invent a second portable layout under pf-core/schemas/.

Acceptance

• Schema ids match PF-Core mirrors under adapters/pcs/schemas/; digests documented against SCHEMA_PINS.json.
• PF-Core offline tests remain green on vendored fixtures (run in provability-fabric-core after pin):

export PYTHONPATH=pf-core/validator:.
pytest adapters/pcs/tests pf-core/validator/tests/test_reward_binding.py -q

Non-claims

Schema upstream does not imply reward correctness or verifier accuracy.

Local note

Working tree may already contain draft RewardEvidenceEnvelope.v1 / VerifierProfile.v1 schemas — land them via a focused PR aligned with the mirrors above.