Fix download provider errors with exponential backoff and playmogo support

- Add exponential backoff retry logic to RecoveryStrategies (1s, 2s, 4s...)
- Add TimeoutError to network failure handling for HTTPS timeouts
- Add playmogo.com referer header for Doodstream provider
- Add Optional import to error_handler.py
- Add sanitize_url_for_logging utility function

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/core/error_handler.py

@@ -7,7 +7,7 @@ errors in provider operations with automatic retry mechanisms.
 
 import functools
 import logging
-from typing import Any, Callable, TypeVar
+from typing import Any, Callable, Optional, TypeVar
 
 logger = logging.getLogger(__name__)
 
@@ -42,41 +42,85 @@ class DownloadError(Exception):
 class RecoveryStrategies:
     """Strategies for handling errors and recovering from failures."""
 
-    @staticmethod
-    def handle_network_failure(
-        func: Callable, *args: Any, **kwargs: Any
-    ) -> Any:
-        """Handle network failures with basic retry logic."""
-        max_retries = 3
-        for attempt in range(max_retries):
-            try:
-                return func(*args, **kwargs)
-            except (NetworkError, ConnectionError):
-                if attempt == max_retries - 1:
-                    raise
-                logger.warning(
-                    "Network error on attempt %d, retrying...",
-                    attempt + 1,
-                )
-                continue
+    def __init__(
+        self,
+        max_retries: int = 3,
+        base_delay: float = 1.0,
+        max_delay: float = 60.0,
+        exponential_base: float = 2.0,
+    ) -> None:
+        """Initialize recovery strategies.
 
-    @staticmethod
-    def handle_download_failure(
+        Args:
+            max_retries: Maximum number of retry attempts.
+            base_delay: Initial delay between retries in seconds.
+            max_delay: Maximum delay between retries in seconds.
+            exponential_base: Base for exponential backoff multiplier.
+        """
+        self.max_retries = max_retries
+        self.base_delay = base_delay
+        self.max_delay = max_delay
+        self.exponential_base = exponential_base
+
+    def _calculate_delay(self, attempt: int) -> float:
+        """Calculate delay for given retry attempt using exponential backoff.
+
+        Args:
+            attempt: Zero-based retry attempt number.
+
+        Returns:
+            Delay in seconds before next retry.
+        """
+        delay = self.base_delay * (self.exponential_base ** attempt)
+        return min(delay, self.max_delay)
+
+    def handle_network_failure(
+        self,
         func: Callable, *args: Any, **kwargs: Any
     ) -> Any:
-        """Handle download failures with retry logic."""
-        max_retries = 2
-        for attempt in range(max_retries):
+        """Handle network failures with exponential backoff retry logic."""
+        last_error: Optional[Exception] = None
+        for attempt in range(self.max_retries):
             try:
                 return func(*args, **kwargs)
-            except DownloadError:
-                if attempt == max_retries - 1:
-                    raise
-                logger.warning(
-                    "Download error on attempt %d, retrying...",
-                    attempt + 1,
-                )
-                continue
+            except (NetworkError, ConnectionError, TimeoutError) as exc:
+                last_error = exc
+                if attempt < self.max_retries - 1:
+                    delay = self._calculate_delay(attempt)
+                    logger.warning(
+                        "Network error on attempt %d/%d, retrying in %.1fs: %s",
+                        attempt + 1, self.max_retries, delay, exc
+                    )
+                    import time
+                    time.sleep(delay)
+                    continue
+        if last_error:
+            raise last_error
+        raise NetworkError("Network failure after retries")
+
+    def handle_download_failure(
+        self,
+        func: Callable, *args: Any, **kwargs: Any
+    ) -> Any:
+        """Handle download failures with exponential backoff retry logic."""
+        last_error: Optional[Exception] = None
+        for attempt in range(self.max_retries):
+            try:
+                return func(*args, **kwargs)
+            except DownloadError as exc:
+                last_error = exc
+                if attempt < self.max_retries - 1:
+                    delay = self._calculate_delay(attempt)
+                    logger.warning(
+                        "Download error on attempt %d/%d, retrying in %.1fs: %s",
+                        attempt + 1, self.max_retries, delay, exc
+                    )
+                    import time
+                    time.sleep(delay)
+                    continue
+        if last_error:
+            raise last_error
+        raise DownloadError("Download failed after retries")
 
 
 class FileCorruptionDetector: