bug: orchestrator.py calls non-existent LLMInterface.initialize() #3974

Problem

Orchestrator tries to call self.llm_interface.initialize() on lines 412 and 1145, but LLMInterface class doesn't have an async initialize() method.

Root Cause

• LLMInterface initialization happens completely in init() via helper methods like _init_configuration(), _init_hardware_detector(), etc.
• No separate async initialize() method exists
• Orchestrator falsely expects one (lines 412, 1145)

Impact

• Orchestrator initialization fails (non-fatal error)
• All backend workers show: "'LLMInterface' object has no attribute 'initialize'"
• Creates repeated startup warnings but doesn't fully break the service

Fix

Remove the calls to self.llm_interface.initialize() since LLMInterface is already initialized in init

Files to Fix

• autobot-backend/orchestrator.py line 412 (remove from asyncio.gather)
• autobot-backend/orchestrator.py line 1145 (remove reinit call)