docs(admission): resolve approval audit tenant and redaction inputs

Assistant: codex
Assistant-Model: gpt-5.6-luna
Assistant-Session: 01a07ff8-19d0-7820-b4d0-1353833cb7fc

tests/test_audit.py

@@ -42,6 +42,7 @@ def test_audit_sender_adapts_envelope_and_rereads_token(tmp_path):
     assert body["id"] == body["correlation_id"] or body["correlation_id"]
     assert body["type"] == "approval.issuance"
     assert body["source"] == "approval-engine"
+    assert body["tenant"] == "tenant:platform"
     engine.close()