refactored: to utilise the google adk and production grade agent

app/states/state.py

@@ -4,13 +4,17 @@ from typing import Any, Dict, List, Optional, TypedDict
 
 
 class GCPArchitectureState(TypedDict, total=False):
-    """LangGraph State tracking state across all 4 workflow phases."""
+    """LangGraph State tracking state across all workflow phases."""
 
     # Workflow Request / Input Intent
     workflow_request: str
     target_dir: str
 
-    # Phase Outputs
+    # Pre-emptive Source Environment Discovery Outputs (Before State)
+    source_discovery_doc: Optional[str]
+    source_mermaid_diagram: Optional[str]
+
+    # Target Phase Outputs (After State)
     requirements_doc: Optional[str]
     architecture_doc: Optional[str]
     mermaid_diagram: Optional[str]