feat: complete phase6 webbridge with integrity/isolation modules, requests dep, and docs

main.py

@@ -390,6 +390,7 @@ def show_scheduling():
             scheduler = CoreScheduler()
             bridges = []
             for algo in st.session_state.pipeline:
+                algo_type = algo.get("type", "python")
                 tpl = None
                 if auto_apply_template:
                     try:
@@ -421,7 +422,6 @@ def show_scheduling():
                     preprocessing = []
 
                 from src.bridges import PythonBridge, CppBridge
-                algo_type = algo.get("type", "python")
                 
                 if algo_type == "python":
                     try: