Add admin panel, WebSocket support, and API versioning

Introduce an admin portal (React + Nginx), WebSocket routing, and
API versioning middleware with `/api/v1/` prefix deprecation.
Add master API key authentication, new Prometheus metrics for AI
token consumption and active WebSockets, and extend S3 config
with a public endpoint URL. Update test paths and fixtures to
align with the new routing structure.

tests/test_services.py

@@ -9,9 +9,10 @@ from pathlib import Path
 
 # ── Tests EXIF ────────────────────────────────────────────────
 
-def test_exif_missing_file():
+@pytest.mark.asyncio
+async def test_exif_missing_file():
     from app.services.exif_service import extract_exif
-    result = extract_exif("/tmp/non_existant.jpg")
+    result = await extract_exif("/tmp/non_existant.jpg")
     assert result["make"] is None
     assert result["gps_lat"] is None
     assert result["raw"] == {}
@@ -32,10 +33,11 @@ def test_exif_dms_to_decimal():
 
 # ── Tests OCR ─────────────────────────────────────────────────
 
-def test_ocr_disabled(monkeypatch):
+@pytest.mark.asyncio
+async def test_ocr_disabled(monkeypatch):
     monkeypatch.setattr("app.services.ocr_service.settings.OCR_ENABLED", False)
     from app.services.ocr_service import extract_text
-    result = extract_text("/tmp/test.jpg")
+    result = await extract_text("/tmp/test.jpg")
     assert result["has_text"] is False
     assert result["text"] is None
 
@@ -72,6 +74,8 @@ def test_image_detail_schema():
 
     # Simule un objet Image ORM
     mock_img = MagicMock()
+    mock_img.client_id = "test-client-123"
+    mock_img.client.name = "Test Client"
     mock_img.id = 1
     mock_img.uuid = "abc-123"
     mock_img.original_name = "test.jpg"