refactor(access): migrate to SDKConfig for authentication and provider management

- Replaced `config.Config` with `SDKConfig` in authentication and provider logic for consistency with SDK changes.
- Updated provider registration, reconciliation, and build functions to align with the `SDKConfig` structure.
- Refactored related imports and handlers to support the new configuration approach.
- Improved clarity and reduced redundancy in API key synchronization and provider initialization.

sdk/cliproxy/builder.go

@@ -184,7 +184,7 @@ func (b *Builder) Build() (*Service, error) {
 	if accessManager == nil {
 		accessManager = sdkaccess.NewManager()
 	}
-	providers, err := sdkaccess.BuildProviders(b.cfg)
+	providers, err := sdkaccess.BuildProviders(&b.cfg.SDKConfig)
 	if err != nil {
 		return nil, err
 	}

sdk/cliproxy/service.go

@@ -12,6 +12,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/access"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/api"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
 	geminiwebclient "github.com/router-for-me/CLIProxyAPI/v6/internal/provider/gemini-web"
@@ -115,7 +116,7 @@ func (s *Service) refreshAccessProviders(cfg *config.Config) {
 	s.cfgMu.RUnlock()
 
 	existing := s.accessManager.Providers()
-	providers, added, updated, removed, err := sdkaccess.ReconcileProviders(oldCfg, cfg, existing)
+	providers, added, updated, removed, err := access.ReconcileProviders(oldCfg, cfg, existing)
 	if err != nil {
 		log.Errorf("failed to reconcile request auth providers: %v", err)
 		return