Adapt tests for pod_executor package and clean up mcp_forge

- Created tests/pod_executor/ with adapted tests from old locations
- tests/pod_executor/simple/test_executor.py: 17/17 tests passing
- tests/pod_executor/security/test_resource_limits.py: 22/23 tests passing

- Removed old test locations (will be deleted with mcp_forge cleanup)
- Fixed all corrupted files from sed/quote issues using Python scripts
- Removed mcp_forge dependencies from pod_executor:
  - Removed ForgeConfig from backend.py (explicit parameters)
  - Removed SessionConfig from sessions.py (explicit parameters)
  - Fixed all audit logger calls to use string-based events

- Updated mcp_forge/security/__init__.py:
  - Removed resource_limits imports (now in pod_executor)
  - Added comment directing to pod_executor.security.resource_limits

- Deleted from mcp_forge:
  - src/mcp_forge/execution/ (simple and jupyter backends)
  - src/mcp_forge/podman/ (container management)
  - src/mcp_forge/security/resource_limits.py

Total: 39/40 tests passing in pod_executor package

src/pod_executor/jupyter/sessions.py

@@ -108,15 +108,15 @@ class SessionManager:
         Initialize session manager.
         
         Args:
-            kernel_manager: Kernel lifecycle manager
-            idle_timeout: Session idle timeout in seconds (default: 3600)
+            kernel_manager: Jupyter kernel manager instance
+            idle_timeout: Seconds before idle session cleanup (default: 3600)
             max_sessions: Maximum concurrent sessions (default: 10)
-            audit_logger: Optional audit logger (uses NullAuditLogger if None)
+            audit_logger: Optional audit logger (defaults to NullAuditLogger)
         """
-        self.kernel_manager = kernel_manager
         self.idle_timeout = idle_timeout
         self.max_sessions = max_sessions
-        self.audit_logger = audit_logger or NullAuditLogger()
+        self.kernel_manager = kernel_manager
+        self.audit_logger = audit_logger if audit_logger is not None else NullAuditLogger()
         self.sessions: Dict[str, Session] = {}
     
     def create_session(
@@ -171,8 +171,8 @@ class SessionManager:
         
         # Log session creation
         self.audit_logger.log(
-            event_type="SESSION_CREATE,
-            severity="INFO,
+            event_type="session.create",
+            severity="info",
             message=f"Session created: {session_id}",
             session_id=session_id,
             details={
@@ -373,8 +373,8 @@ class SessionManager:
         except Exception as e:
             # Log but continue with cleanup
             self.audit_logger.log(
-                event_type="SESSION_DESTROY,
-                severity="WARNING,
+                event_type="session.destroy",
+                severity="warning",
                 message=f"Error shutting down kernel for session {session_id}",
                 session_id=session_id,
                 error=str(e)
@@ -385,8 +385,8 @@ class SessionManager:
         
         # Log destruction
         self.audit_logger.log(
-            event_type="SESSION_DESTROY,
-            severity="INFO,
+            event_type="session.destroy",
+            severity="info",
             message=f"Session destroyed: {session_id}",
             session_id=session_id
         )