Refactor streaming readers: Split into modular files and implement base class

- Removed the existing `readers.py` file and created separate modules for `FFmpegRTSPReader`, `HTTPSnapshotReader`, and utility functions.
- Introduced an abstract base class `VideoReader` to standardize the interface for video stream readers.
- Updated `FFmpegRTSPReader` and `HTTPSnapshotReader` to inherit from `VideoReader` and implement required methods.
- Enhanced logging utilities for better readability and maintainability.
- Removed `pycuda` from requirements as it is no longer needed.

core/streaming/readers/base.py

@@ -0,0 +1,65 @@
+"""
+Abstract base class for video stream readers.
+"""
+from abc import ABC, abstractmethod
+from typing import Optional, Callable
+import numpy as np
+
+
+class VideoReader(ABC):
+    """Abstract base class for video stream readers."""
+
+    def __init__(self, camera_id: str, source_url: str, max_retries: int = 3):
+        """
+        Initialize the video reader.
+
+        Args:
+            camera_id: Unique identifier for the camera
+            source_url: URL or path to the video source
+            max_retries: Maximum number of retry attempts
+        """
+        self.camera_id = camera_id
+        self.source_url = source_url
+        self.max_retries = max_retries
+        self.frame_callback: Optional[Callable[[str, np.ndarray], None]] = None
+
+    @abstractmethod
+    def start(self) -> None:
+        """Start the video reader."""
+        pass
+
+    @abstractmethod
+    def stop(self) -> None:
+        """Stop the video reader."""
+        pass
+
+    @abstractmethod
+    def set_frame_callback(self, callback: Callable[[str, np.ndarray], None]) -> None:
+        """
+        Set callback function to handle captured frames.
+
+        Args:
+            callback: Function that takes (camera_id, frame) as arguments
+        """
+        pass
+
+    @property
+    @abstractmethod
+    def is_running(self) -> bool:
+        """Check if the reader is currently running."""
+        pass
+
+    @property
+    @abstractmethod
+    def reader_type(self) -> str:
+        """Get the type of reader (e.g., 'rtsp', 'http_snapshot')."""
+        pass
+
+    def __enter__(self):
+        """Context manager entry."""
+        self.start()
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        """Context manager exit."""
+        self.stop()