fix: resolve agent initialization error causing maintenance mode

- Add proper agent initialization in ChatService._initialize_agents()
- Create master_agent instance in chat.py routes
- Add agent_id attribute to all agent instances
- Update Makefile to use python3 instead of python3.11

This fix enables the multi-agent system to process messages correctly,
routing conversations to appropriate agents (Drummond, Zumbi, Anita, etc.)
instead of returning maintenance mode responses.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Makefile

@@ -4,7 +4,7 @@
 .DEFAULT_GOAL := help
 
 # Variables
-PYTHON := python3.11
+PYTHON := python3
 PIP := $(PYTHON) -m pip
 PYTEST := $(PYTHON) -m pytest
 BLACK := $(PYTHON) -m black

src/api/routes/chat.py

@@ -25,6 +25,9 @@ router = APIRouter(prefix="/api/v1/chat", tags=["chat"])
 # Services are already initialized
 intent_detector = IntentDetector()
 
+# Initialize master agent
+master_agent = MasterAgent()
+
 class ChatRequest(BaseModel):
     """Chat message request"""
     message: str = Field(..., min_length=1, max_length=1000)

src/services/chat_service.py

@@ -366,8 +366,8 @@ class ChatService:
         self.sessions: Dict[str, ChatSession] = {}
         self.messages: Dict[str, List[Dict]] = defaultdict(list)
         
-        # Agents will be initialized lazily when needed
-        self.agents = {}
+        # Initialize agents
+        self._initialize_agents()
     
     async def get_or_create_session(
         self, 
@@ -444,4 +444,27 @@ class ChatService:
         """Update session with current investigation"""
         if session_id in self.sessions:
             self.sessions[session_id].current_investigation_id = investigation_id
-            self.sessions[session_id].last_activity = datetime.utcnow()
+            self.sessions[session_id].last_activity = datetime.utcnow()
+    
+    def _initialize_agents(self):
+        """Initialize available agents"""
+        # Import here to avoid circular imports
+        from src.agents import (
+            MasterAgent, InvestigatorAgent, AnalystAgent,
+            ReporterAgent, CommunicationAgent
+        )
+        
+        # Create agent instances
+        agents = {
+            "abaporu": MasterAgent(),
+            "zumbi": InvestigatorAgent(),
+            "anita": AnalystAgent(),
+            "tiradentes": ReporterAgent(),
+            "drummond": CommunicationAgent()
+        }
+        
+        # Add agent_id attribute to each agent
+        for agent_id, agent in agents.items():
+            agent.agent_id = agent_id
+            
+        self.agents = agents