[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_tiling.py

@@ -28,32 +28,22 @@ def _assert_no_same_label_near_duplicate_centers(detections):
 
 
 @pytest.mark.slow
-def test_ft_p_04_gsd_based_tiling_ac1(http_client, image_large, warm_engine, auth_headers):
-    config = json.dumps(_GSD)
-    r = http_client.post(
-        "/detect/image",
-        files={"file": ("img.jpg", image_large, "image/jpeg")},
-        data={"config": config},
-        headers=auth_headers,
+def test_ft_p_04_gsd_based_tiling_ac1(image_detect, image_large, warm_engine):
+    body, _ = image_detect(
+        image_large, "img.jpg",
+        config=json.dumps(_GSD),
         timeout=_TILING_TIMEOUT,
     )
-    assert r.status_code == 200
-    body = r.json()
     assert isinstance(body, list)
     _assert_coords_normalized(body)
 
 
 @pytest.mark.slow
-def test_ft_p_16_tile_boundary_deduplication_ac2(http_client, image_large, warm_engine, auth_headers):
-    config = json.dumps({**_GSD, "big_image_tile_overlap_percent": 20})
-    r = http_client.post(
-        "/detect/image",
-        files={"file": ("img.jpg", image_large, "image/jpeg")},
-        data={"config": config},
-        headers=auth_headers,
+def test_ft_p_16_tile_boundary_deduplication_ac2(image_detect, image_large, warm_engine):
+    body, _ = image_detect(
+        image_large, "img.jpg",
+        config=json.dumps({**_GSD, "big_image_tile_overlap_percent": 20}),
         timeout=_TILING_TIMEOUT,
     )
-    assert r.status_code == 200
-    body = r.json()
     assert isinstance(body, list)
     _assert_no_same_label_near_duplicate_centers(body)