fix: add missing ConversationContext class and fix import path

Fixed deployment issues:
1. Corrected import path from conversational_memory to conversational
2. Added missing ConversationContext dataclass to conversational.py

The ConversationContext class stores session information for chat
conversations including session_id, user_id, user_profile and metadata.

This resolves the ModuleNotFoundError preventing HuggingFace deployment.

src/agents/drummond.py

@@ -22,7 +22,7 @@ from src.agents.deodoro import BaseAgent, AgentContext, AgentMessage, AgentRespo
 from src.core import get_logger
 from src.core.exceptions import AgentExecutionError, DataAnalysisError
 from src.services.chat_service import IntentType, Intent
-from src.memory.conversational_memory import ConversationalMemory, ConversationContext
+from src.memory.conversational import ConversationalMemory, ConversationContext
 
 
 class CommunicationChannel(Enum):

src/memory/conversational.py

@@ -2,9 +2,23 @@
 
 from typing import Any, Dict, List, Optional
 from datetime import datetime
+from dataclasses import dataclass
 from .base import BaseMemory
 
 
+@dataclass
+class ConversationContext:
+    """Context information for conversations."""
+    session_id: str
+    user_id: Optional[str] = None
+    user_profile: Optional[Dict[str, Any]] = None
+    metadata: Dict[str, Any] = None
+    
+    def __post_init__(self):
+        if self.metadata is None:
+            self.metadata = {}
+
+
 class ConversationalMemory(BaseMemory):
     """Memory for conversational contexts and chat history."""