Move authentication probes into the outbound adapter

internal/usecase/smoke_tester.go

@@ -17,6 +17,7 @@ import (
 type SmokeTester struct {
 	runner     *Runner
 	httpClient smokeHTTPGetter
+	authClient smokeAuthenticationClient
 	now        func() time.Time
 }
 
@@ -24,18 +25,22 @@ type SmokeTester struct {
 // leaves HTTP operations unsupported rather than falling back to another client.
 func NewSmokeTester(runner *Runner, httpClient *llm.OpenAICompatibleClient) *SmokeTester {
 	var getter smokeHTTPGetter
+	var authentication smokeAuthenticationClient
 	if httpClient != nil {
 		getter = httpClient
+		authentication = httpClient
 	}
-	return &SmokeTester{runner: runner, httpClient: getter, now: time.Now}
+	return &SmokeTester{runner: runner, httpClient: getter, authClient: authentication, now: time.Now}
 }
 
 func newSmokeTesterWithClock(runner *Runner, httpClient *llm.OpenAICompatibleClient, now func() time.Time) *SmokeTester {
 	var getter smokeHTTPGetter
+	var authentication smokeAuthenticationClient
 	if httpClient != nil {
 		getter = httpClient
+		authentication = httpClient
 	}
-	return &SmokeTester{runner: runner, httpClient: getter, now: now}
+	return &SmokeTester{runner: runner, httpClient: getter, authClient: authentication, now: now}
 }
 
 // Run selects and executes one diagnostic, retaining only factual results.
@@ -126,7 +131,7 @@ func (t *SmokeTester) Run(ctx context.Context, request domain.SmokeTestRequest)
 		return t.finishHTTP(ctx, report, finish)
 	case domain.SmokeTestAuthentication:
 		requestStartedAt := now().UTC()
-		outcome, err := (authenticationProbe{client: t.httpClient}).run(ctx, selection.backend, selection.target)
+		outcome, err := (authenticationProbe{client: t.authClient}).run(ctx, selection.backend, selection.target)
 		requestDuration := nonnegativeDuration(now().UTC().Sub(requestStartedAt))
 		if err != nil {
 			if contextErr := ctx.Err(); contextErr != nil {
@@ -349,7 +354,7 @@ func (t *SmokeTester) setSupport(report *domain.SmokeTestReport, selection *smok
 		report.Applicable = boolPointer(true)
 		return nil
 	case domain.SmokeTestAuthentication:
-		outcome, err := (authenticationProbe{client: t.httpClient}).support(selection.backend)
+		outcome, err := (authenticationProbe{client: t.authClient}).support(selection.backend)
 		if err != nil {
 			return err
 		}