chore(logging): add debug logs for executor Refresh methods

- Introduced `logrus` for structured debugging across all executors.
- Added debug log messages in `Refresh` methods for better traceability.
- Updated `Manager` to log additional details during refresh checks.

internal/runtime/executor/openai_compat_executor.go

@@ -13,6 +13,7 @@ import (
 	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
 	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/executor"
 	sdktranslator "github.com/router-for-me/CLIProxyAPI/v6/sdk/translator"
+	log "github.com/sirupsen/logrus"
 )
 
 // OpenAICompatExecutor implements a stateless executor for OpenAI-compatible providers.
@@ -147,6 +148,7 @@ func (e *OpenAICompatExecutor) ExecuteStream(ctx context.Context, auth *cliproxy
 
 // Refresh is a no-op for API-key based compatibility providers.
 func (e *OpenAICompatExecutor) Refresh(ctx context.Context, auth *cliproxyauth.Auth) (*cliproxyauth.Auth, error) {
+	log.Debugf("openai compat executor: refresh called")
 	_ = ctx
 	return auth, nil
 }