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_storage_tracker.py

@@ -0,0 +1,73 @@
+import pytest
+import json
+from unittest.mock import AsyncMock, patch, MagicMock
+from services.storage_tracker import StorageTracker
+
+@pytest.mark.asyncio
+async def test_track_file_redis_success():
+    tracker = StorageTracker()
+    mock_redis = AsyncMock()
+    tracker._redis = mock_redis
+    
+    job_id = "tr_123456789012"
+    metadata = {
+        "original_filename": "test.docx",
+        "file_size": 1024,
+        "file_hash": "abcde12345",
+        "user_id": "user_1"
+    }
+    
+    success = await tracker.track_file(job_id, metadata)
+    
+    assert success is True
+    # Check if set was called with correct key and serialized json
+    args, kwargs = mock_redis.set.call_args
+    assert args[0] == f"translation:file:{job_id}"
+    stored_data = json.loads(args[1])
+    assert stored_data["original_filename"] == "test.docx"
+    assert "timestamp" in stored_data
+    assert kwargs["ex"] == 3600
+
+@pytest.mark.asyncio
+async def test_get_file_metadata_success():
+    tracker = StorageTracker()
+    mock_redis = AsyncMock()
+    tracker._redis = mock_redis
+    
+    job_id = "tr_123456789012"
+    stored_json = json.dumps({"original_filename": "found.xlsx"})
+    mock_redis.get.return_value = stored_json
+    
+    metadata = await tracker.get_file_metadata(job_id)
+    
+    assert metadata is not None
+    assert metadata["original_filename"] == "found.xlsx"
+    mock_redis.get.assert_called_with(f"translation:file:{job_id}")
+
+@pytest.mark.asyncio
+async def test_track_file_logging():
+    tracker = StorageTracker()
+    mock_redis = AsyncMock()
+    tracker._redis = mock_redis
+    
+    job_id = "tr_log_test"
+    metadata = {
+        "original_filename": "log.docx",
+        "file_size": 2048,
+        "file_hash": "hash_val",
+        "user_id": "user_2"
+    }
+    
+    # Mock _log_info to capture call
+    with patch("services.storage_tracker._log_info") as mock_log:
+        await tracker.track_file(job_id, metadata)
+        
+        assert mock_log.call_count >= 1
+        # Check first call
+        args, kwargs = mock_log.call_args_list[0]
+        assert args[0] == "file_uploaded"
+        assert kwargs["job_id"] == job_id
+        assert kwargs["original_filename"] == "log.docx"
+        assert kwargs["file_hash"] == "hash_val"
+        assert kwargs["user_id"] == "user_2"
+        assert "timestamp" in kwargs