feat: Add OSINT features (v0.1.2)

- MAC vendor lookup (IEEE OUI database)
- BLE company_id to manufacturer mapping
- Device profile enrichment in API responses
- Export endpoints: devices.csv, devices.json, alerts.csv, probes.csv
- Auto-populate vendor on device creation
- CLI command: flask download-oui
- Makefile target: make oui

13 tests passing

tests/test_api/test_export.py

@@ -0,0 +1,17 @@
+"""Export endpoint tests."""
+
+
+def test_export_devices_csv_empty(client):
+    """Test exporting devices CSV when empty."""
+    response = client.get('/api/v1/export/devices.csv')
+    assert response.status_code == 200
+    assert response.content_type == 'text/csv; charset=utf-8'
+    assert b'mac,type,vendor' in response.data
+
+
+def test_export_devices_json_empty(client):
+    """Test exporting devices JSON when empty."""
+    response = client.get('/api/v1/export/devices.json')
+    assert response.status_code == 200
+    assert response.content_type == 'application/json'
+    assert response.json == []