fix: pass all tool refs in a single WithTools call

Genkit rejects multiple WithTools options ("cannot set tools more than
once"). This broke all team/fleet execution that uses tools (blackboard,
messaging). Changed from per-tool WithTools(ref) calls to a single
WithTools(refs...) call for both Chat and Stream paths.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: intel352

genkit/adapter.go

@@ -83,9 +83,8 @@ func (p *genkitProvider) Chat(ctx context.Context, messages []provider.Message,
 
 	if len(tools) > 0 {
 		opts = append(opts, ai.WithReturnToolRequests(true))
-		for _, ref := range p.resolveToolRefs(tools) {
-			opts = append(opts, ai.WithTools(ref))
-		}
+		refs := p.resolveToolRefs(tools)
+		opts = append(opts, ai.WithTools(refs...))
 	}
 
 	resp, err := gk.Generate(ctx, p.g, opts...)
@@ -111,9 +110,8 @@ func (p *genkitProvider) Stream(ctx context.Context, messages []provider.Message
 
 	if len(tools) > 0 {
 		opts = append(opts, ai.WithReturnToolRequests(true))
-		for _, ref := range p.resolveToolRefs(tools) {
-			opts = append(opts, ai.WithTools(ref))
-		}
+		refs := p.resolveToolRefs(tools)
+		opts = append(opts, ai.WithTools(refs...))
 	}
 
 	go func() {