feat: self-hosted gpu api (#636)

* Self-hosted gpu api

* Refactor self-hosted api

* Rename model api tests

* Use lifespan instead of startup event

* Fix self hosted imports

* Add newlines

* Add response models

* Move gpu dir to the root

* Add project description

* Refactor lifespan

* Update env var names for model api tests

* Preload diarizarion service

* Refactor uploaded file paths

server/tests/test_model_api_translation.py

@@ -0,0 +1,56 @@
+"""
+Tests for translation Model API endpoint (self-hosted service compatible shape).
+
+Marked with the "model_api" marker and skipped unless TRANSLATION_URL is provided
+or we fallback to TRANSCRIPT_URL base (same host for self-hosted).
+
+Run locally against self-hosted server:
+    TRANSLATION_API_KEY=dev-key \
+    TRANSLATION_URL=http://localhost:8000 \
+    uv run -m pytest -m model_api --no-cov tests/test_model_api_translation.py
+"""
+
+import os
+
+import httpx
+import pytest
+
+
+def get_translation_url():
+    url = os.environ.get("TRANSLATION_URL") or os.environ.get("TRANSCRIPT_URL")
+    if not url:
+        pytest.skip(
+            "TRANSLATION_URL or TRANSCRIPT_URL environment variable is required for Model API tests"
+        )
+    return url
+
+
+def get_auth_headers():
+    api_key = os.environ.get("TRANSLATION_API_KEY") or os.environ.get(
+        "REFLECTOR_GPU_APIKEY"
+    )
+    return {"Authorization": f"Bearer {api_key}"} if api_key else {}
+
+
+@pytest.mark.model_api
+class TestModelAPITranslation:
+    def test_translate_text(self):
+        url = get_translation_url()
+        headers = get_auth_headers()
+
+        with httpx.Client(timeout=60.0) as client:
+            response = client.post(
+                f"{url}/translate",
+                params={"text": "The meeting will start in five minutes."},
+                json={"source_language": "en", "target_language": "fr"},
+                headers=headers,
+            )
+
+            assert response.status_code == 200, f"Request failed: {response.text}"
+            data = response.json()
+
+            assert "text" in data and isinstance(data["text"], dict)
+            assert data["text"].get("en") == "The meeting will start in five minutes."
+            assert isinstance(data["text"].get("fr", ""), str)
+            assert len(data["text"]["fr"]) > 0
+            assert data["text"]["fr"] == "La réunion commencera dans cinq minutes."