refactor(docker): improve server architecture and configuration

Complete overhaul of Docker deployment setup with improved architecture:
- Add Redis integration for task management
- Implement rate limiting and security middleware
- Add Prometheus metrics and health checks
- Improve error handling and logging
- Add support for streaming responses
- Implement proper configuration management
- Add platform-specific optimizations for ARM64/AMD64

BREAKING CHANGE: Docker deployment now requires Redis and new config.yml structure

deploy/docker/utils.py

@@ -0,0 +1,54 @@
+import logging
+import yaml
+from datetime import datetime
+from enum import Enum
+from pathlib import Path
+from fastapi import Request
+from typing import Dict, Optional
+
+class TaskStatus(str, Enum):
+    PROCESSING = "processing"
+    FAILED = "failed"
+    COMPLETED = "completed"
+
+class FilterType(str, Enum):
+    RAW = "raw"
+    FIT = "fit"
+    BM25 = "bm25"
+    LLM = "llm"
+
+def load_config() -> Dict:
+    """Load and return application configuration."""
+    config_path = Path(__file__).parent / "config.yml"
+    with open(config_path, "r") as config_file:
+        return yaml.safe_load(config_file)
+
+def setup_logging(config: Dict) -> None:
+    """Configure application logging."""
+    logging.basicConfig(
+        level=config["logging"]["level"],
+        format=config["logging"]["format"]
+    )
+
+def get_base_url(request: Request) -> str:
+    """Get base URL including scheme and host."""
+    return f"{request.url.scheme}://{request.url.netloc}"
+
+def is_task_id(value: str) -> bool:
+    """Check if the value matches task ID pattern."""
+    return value.startswith("llm_") and "_" in value
+
+def datetime_handler(obj: any) -> Optional[str]:
+    """Handle datetime serialization for JSON."""
+    if hasattr(obj, 'isoformat'):
+        return obj.isoformat()
+    raise TypeError(f"Object of type {type(obj)} is not JSON serializable")
+
+def should_cleanup_task(created_at: str) -> bool:
+    """Check if task should be cleaned up based on creation time."""
+    created = datetime.fromisoformat(created_at)
+    return (datetime.now() - created).total_seconds() > 3600
+
+def decode_redis_hash(hash_data: Dict[bytes, bytes]) -> Dict[str, str]:
+    """Decode Redis hash data from bytes to strings."""
+    return {k.decode('utf-8'): v.decode('utf-8') for k, v in hash_data.items()}