feat: production deployment - full update with providers, admin, glossaries, pricing, tests

Major changes across backend, frontend, infrastructure:
- Provider system with model selection (Google, DeepL, OpenAI, Ollama, Google Cloud)
- Admin panel: user management, pricing, settings
- Glossary system with CSV import/export
- Subscription and tier quota management
- Security hardening (rate limiting, API key auth, path traversal fixes)
- Docker compose for dev, prod, and IONOS deployment
- Alembic migrations for new tables
- Frontend: dashboard, pricing page, landing page, i18n (en/fr)
- Test suite and verification scripts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/test_translation_metadata_integration.py

@@ -0,0 +1,107 @@
+import pytest
+import hashlib
+from fastapi.testclient import TestClient
+from unittest.mock import patch, AsyncMock, MagicMock
+from main import app
+from routes.translate_routes import get_authenticated_user
+
+client = TestClient(app)
+
+
+class MockUser:
+    def __init__(self, user_id="user_123"):
+        self.id = user_id
+        self.plan = "free"
+
+
+async def mock_auth():
+    return MockUser()
+
+
+@pytest.mark.asyncio
+async def test_translate_endpoint_triggers_tracking():
+    app.dependency_overrides[get_authenticated_user] = mock_auth
+
+    with patch(
+        "routes.translate_routes.storage_tracker.track_file", new_callable=AsyncMock
+    ) as mock_track:
+        with patch("routes.translate_routes.file_validator.validate_async") as mock_val:
+            mock_val.return_value.is_valid = True
+            mock_val.return_value.data = {"extension": ".docx", "size_bytes": 500}
+
+            file_content = b"PK\x03\x04fake_office_content_for_testing"
+            with patch(
+                "routes.translate_routes.file_handler_util.save_upload_file",
+                new_callable=AsyncMock,
+            ) as mock_save:
+                with patch(
+                    "routes.translate_routes.file_handler_util.calculate_sha256"
+                ) as mock_hash:
+                    with patch(
+                        "routes.translate_routes.file_handler_util.cleanup_file"
+                    ) as mock_cleanup:
+                        mock_save.return_value = None
+                        expected_hash = hashlib.sha256(file_content).hexdigest()
+                        mock_hash.return_value = expected_hash
+
+                        files = {
+                            "file": (
+                                "test.docx",
+                                file_content,
+                                "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+                            )
+                        }
+                        response = client.post(
+                            "/api/v1/translate", data={"target_lang": "fr"}, files=files
+                        )
+
+                        assert response.status_code == 202
+                        job_id = response.json()["data"]["id"]
+
+                        mock_track.assert_called_once()
+                        args, kwargs = mock_track.call_args
+                        assert kwargs["job_id"] == job_id
+                        assert kwargs["metadata"]["original_filename"] == "test.docx"
+                        assert kwargs["metadata"]["file_hash"] == expected_hash
+                        assert kwargs["metadata"]["user_id"] == "user_123"
+                        assert "timestamp" in kwargs["metadata"]
+
+    app.dependency_overrides.clear()
+
+
+@pytest.mark.asyncio
+async def test_translate_endpoint_handles_hash_failure():
+    app.dependency_overrides[get_authenticated_user] = mock_auth
+
+    with patch("routes.translate_routes.file_validator.validate_async") as mock_val:
+        mock_val.return_value.is_valid = True
+        mock_val.return_value.data = {"extension": ".docx", "size_bytes": 500}
+
+        file_content = b"PK\x03\x04fake_office_content"
+        with patch(
+            "routes.translate_routes.file_handler_util.save_upload_file",
+            new_callable=AsyncMock,
+        ):
+            with patch(
+                "routes.translate_routes.file_handler_util.calculate_sha256",
+                return_value=None,
+            ):
+                with patch(
+                    "routes.translate_routes.file_handler_util.cleanup_file"
+                ) as mock_cleanup:
+                    files = {
+                        "file": (
+                            "test.docx",
+                            file_content,
+                            "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+                        )
+                    }
+                    response = client.post(
+                        "/api/v1/translate", data={"target_lang": "fr"}, files=files
+                    )
+
+                    assert response.status_code == 400
+                    assert response.json()["error"] == "CORRUPTED_FILE"
+                    mock_cleanup.assert_called_once()
+
+    app.dependency_overrides.clear()