integrate-arcjet-guard-agent-framework-golisted

# Integrate Arcjet Guard into Microsoft Agent Framework for Go `github.com/arcjet/arcjet-go/agentframework` wraps the application's existing `arcjet.GuardClient`. Shared Guard fundamentals (client, rules, labels, decisions, capture) live in [../arcjet/references/guards_go.md](../arcjet/references/guards_go.md). Load that reference for anything that is not framework-specific. Three surfaces, one decision rule: - **Any Go function** → `arcjet.GuardAction` in the root module. No framework dependency. Returns `*arcjet.GuardDeniedError` or `*arcjet.GuardUnavailableError`. - **A `tool.FuncTool` you can name at wiring time** (from `functool.New`, `mcptool.ListTools`, or `agenttool.New`) → `agentframework.GuardTool`, or `GuardTools` for a list. The result is still a `tool.FuncTool`. - **An agent whose tools the model picks, or user text to screen** → `agentframework.GuardMiddleware` in `agent.Config.Middlewares`. This is the Go framework. The .NET and Python Microsoft Agent Framework implementations have no Arcjet adapter. Do not import `@arcjet/guard` or `arcjet.guard` here. ## Denials are tool results, never errors The framework replaces a tool error with `Error: Function failed.` and allows three consecutive rounds of failing tool calls before the fourth ends the run. `GuardTool` therefore returns `arcjet.GuardDenialResult` as a successful result. Do not "fix" this by returning an error, and do not set `IncludeDetailedErrors` to make errors carry the denial. ## Fa