docs(06.2): capture phase context + fix admin user creation 500

- Phase 6.2 CONTEXT.md: cloud-delete propagation, SHARE-03/05, audit
  log CSV export fix, daily export UI, user handle display
- Fix: admin create_user missing session.flush() before write_audit_log
  caused FK violation on PostgreSQL (silent on SQLite)
- Regression test: test_create_user_writes_audit_log in test_admin_api.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/tests/test_admin_api.py

@@ -21,7 +21,8 @@ import pytest_asyncio
 from httpx import ASGITransport, AsyncClient
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from db.models import Quota, User
+from db.models import AuditLog, Quota, User
+from sqlalchemy import select
 from deps.auth import get_current_admin
 from deps.db import get_db
 from services.auth import hash_password
@@ -140,6 +141,24 @@ async def test_create_user_sets_password_must_change(admin_client):
     assert user.password_must_change is True
 
 
+@pytest.mark.asyncio
+async def test_create_user_writes_audit_log(admin_client):
+    """POST /api/admin/users → 201 and audit_log row created (regression: FK ordering bug)."""
+    client, _admin, session = admin_client
+    body = {
+        "handle": "auditcheck_user",
+        "email": "auditcheck@example.com",
+        "password": "AuditCheck1@Pass",
+        "role": "user",
+    }
+    resp = await client.post("/api/admin/users", json=body)
+    assert resp.status_code == 201, f"expected 201, got {resp.status_code}: {resp.text}"
+    result = await session.execute(
+        select(AuditLog).where(AuditLog.event_type == "admin.user_created")
+    )
+    assert result.scalars().first() is not None, "audit log entry not created after user creation"
+
+
 @pytest.mark.asyncio
 async def test_create_user_weak_password(admin_client):
     """POST /api/admin/users with weak password → 422."""