feat(sandbox): add Python 3 code execution sandbox support

sandbox/app/core/executor.py

@@ -0,0 +1,48 @@
+"""Code execution engine"""
+import os
+from typing import Optional
+from abc import ABC, abstractmethod
+
+from app.config import get_config
+from app.logger import get_logger
+from app.models import RunnerOptions
+
+
+class ExecutionResult:
+    """Result of code execution"""
+
+    def __init__(self, stdout: str = "", stderr: str = "", exit_code: int = 0, error: Optional[str] = None):
+        self.stdout = stdout
+        self.stderr = stderr
+        self.exit_code = exit_code
+        self.error = error
+
+
+class CodeExecutor(ABC):
+    """Base code executor"""
+
+    def __init__(self):
+        self.logger = get_logger()
+        self.config = get_config()
+
+    @abstractmethod
+    async def run(
+            self,
+            code: str,
+            options: RunnerOptions,
+            preload: str = "",
+            timeout: Optional[int] = None
+    ) -> ExecutionResult:
+        pass
+
+    def cleanup_temp_file(self, file_path: str) -> None:
+        """Remove temporary file
+        
+        Args:
+            file_path: Path to file to remove
+        """
+        try:
+            if os.path.exists(file_path):
+                os.remove(file_path)
+        except Exception as e:
+            self.logger.warning(f"Failed to cleanup temp file {file_path}: {e}")