identity: Próspera agentic-companies pilot framing — no personal names

- README: the stack belongs to Cayce, an autonomous entity operating under
  the Próspera ZEDE agentic-companies jurisdiction pilot; the experiment is
  managed by Cayce itself
- tests: approver actor renamed to the generic label operator
- zero occurrences of personal names in the tree (verified with grep)

tests/test_models.py

@@ -37,7 +37,7 @@ def test_proposal_status_transitions(sess):
     sess.flush()
 
     p.status = ProposalStatus.APPROVED
-    p.approved_by = "gustavo"
+    p.approved_by = "operator"
     p.approved_at = datetime.now(UTC)
     p.status = ProposalStatus.RUNNING
     p.status = ProposalStatus.DONE
@@ -45,7 +45,7 @@ def test_proposal_status_transitions(sess):
 
     loaded = sess.scalar(select(Proposal).where(Proposal.id == p.id))
     assert loaded.status == ProposalStatus.DONE
-    assert loaded.approved_by == "gustavo"
+    assert loaded.approved_by == "operator"
 
 
 def test_dedupe_key_unique(sess):
@@ -65,12 +65,12 @@ def test_audit_helper_writes(sess):
     p = Proposal(kind="other", title="x")
     sess.add(p)
     sess.flush()
-    audit(sess, actor="gustavo", action="approve", proposal_id=p.id, detail={"note": "ok"})
+    audit(sess, actor="operator", action="approve", proposal_id=p.id, detail={"note": "ok"})
     sess.flush()
 
     rows = list(sess.scalars(select(AuditEntry)).all())
     assert len(rows) == 1
-    assert rows[0].actor == "gustavo"
+    assert rows[0].actor == "operator"
     assert rows[0].proposal_id == p.id