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_utils/test_ble_companies.py

@@ -0,0 +1,25 @@
+"""BLE company lookup tests."""
+from esp32_web.utils.ble_companies import lookup_ble_company, get_all_companies
+
+
+def test_lookup_apple():
+    """Test Apple company ID lookup."""
+    assert lookup_ble_company(0x004C) == 'Apple, Inc.'
+
+
+def test_lookup_google():
+    """Test Google company ID lookup."""
+    assert lookup_ble_company(0x00E0) == 'Google'
+
+
+def test_lookup_unknown():
+    """Test unknown company ID lookup."""
+    assert lookup_ble_company(0xFFFF) is None
+
+
+def test_get_all_companies():
+    """Test getting all companies."""
+    companies = get_all_companies()
+    assert isinstance(companies, dict)
+    assert len(companies) > 0
+    assert 0x004C in companies