Customizes the voice AI agent for telephone demos with Manchester, NH subscribers. Adds location-aware responses and local information lookup.

Changes

• Agent instructions: Manchester, NH context with local landmarks (Amoskeag Millyard, SNHU Arena, Merrimack River), professional telephone demeanor
• Local information tool: get_local_info function tool covering restaurants, parks, schools, healthcare, shopping, entertainment, airports, and history
• Tests: Location awareness, tool usage, and professional greeting validation
• Documentation: MANCHESTER_DEMO.md with setup and telephony integration guide

Implementation

@function_tool
async def get_local_info(self, context: RunContext, topic: str):
    """Get information about local Manchester, NH services, attractions, or businesses."""
    topic_lower = topic.lower()
    
    if any(word in topic_lower for word in ["restaurant", "food", "dining"]):
        return """Manchester has a diverse dining scene. Popular areas include 
        downtown Elm Street with restaurants like The Copper Door and Hanover Street 
        Chop House. Red Arrow Diner is a local favorite open 24/7."""
    # ... 7 more categories

Agent already had SIP telephony support (BVCTelephony noise cancellation); this adds the Manchester-specific content layer.

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