Added support for the service_tier key in profiles

internal/profile/repository_test.go

@@ -59,6 +59,9 @@ func TestFilesystemRepository_GetProfile(t *testing.T) {
 		if p.ReasoningEffort != "medium" {
 			t.Fatalf("unexpected reasoning_effort: %q", p.ReasoningEffort)
 		}
+		if p.ServiceTier != "priority" {
+			t.Fatalf("unexpected service_tier: %q", p.ServiceTier)
+		}
 	})
 
 	t.Run("valid nested profile", func(t *testing.T) {

internal/profile/testdata/valid_with_api_key_env.yaml

@@ -2,6 +2,7 @@ id: local-secure
 endpoint: http://localhost:8000/v1
 model: gpt-4o-mini
 api_key_env: SCRIPTORIUM_API_KEY
+service_tier: priority
 reasoning_effort: medium
 extra_params:
   provider: local