IArt.
What doesn't work
Your understanding of what constitutes a defensive moat is weak. You are describing features—integrations, autonomous actions, a talented team—not a structural advantage that prevents competition. Anyone with capital can hire engineers and build the same features.
IIArt.
Biggest risk
A large platform like Shopify or a major player in the customer support space like Intercom decides this is a core feature and builds a native, deeply integrated version, effectively making your product obsolete overnight. Your entire business is built on a feature, not a platform.
IIIArt.
Key question
What is the one thing you can do for your customers that is fundamentally impossible for an embedded solution from a platform like Shopify or Zendesk to ever replicate?