[AZ-180] Refactor detection event handling and improve SSE support

- Updated the detection image endpoint to require a channel ID for event streaming.
- Introduced a new endpoint for streaming detection events, allowing clients to receive real-time updates.
- Enhanced the internal buffering mechanism for detection events to manage multiple channels.
- Refactored the inference module to support the new event handling structure.

Made-with: Cursor

e2e/tests/test_negative.py

@@ -1,3 +1,5 @@
+import uuid
+
 import pytest
 import requests
 
@@ -41,6 +43,8 @@ def test_ft_n_03_loader_error_mode_detect_does_not_500(
         f"{mock_loader_url}/mock/config", json={"mode": "error"}, timeout=10
     )
     cfg.raise_for_status()
+    channel_id = str(uuid.uuid4())
+    headers = {**auth_headers, "X-Channel-Id": channel_id}
     files = {"file": ("small.jpg", image_small, "image/jpeg")}
-    r = http_client.post("/detect/image", files=files, headers=auth_headers, timeout=_DETECT_TIMEOUT)
+    r = http_client.post("/detect/image", files=files, headers=headers, timeout=_DETECT_TIMEOUT)
     assert r.status_code != 500