perf(oidc): optimize client verification (#6999)

* fix some spelling errors

* client credential auth

* implementation of client auth

* improve error handling

* unit test command package

* unit test database package

* unit test query package

* cleanup unused tracing func

* fix integration tests

* errz to zerrors

* fix linting and import issues

* fix another linting error

* integration test with client secret

* Revert "integration test with client secret"

This reverts commit 0814ba522f.

* add integration tests

* client credentials integration test

* resolve comments

* pin oidc v3.5.0

internal/api/oidc/server.go

@@ -27,6 +27,10 @@ type Server struct {
 	command *command.Commands
 	keySet  *keySetCache
 
+	defaultLoginURL    string
+	defaultLoginURLV2  string
+	defaultLogoutURLV2 string
+
 	fallbackLogger      *slog.Logger
 	hashAlg             crypto.HashAlgorithm
 	signingKeyAlgorithm string
@@ -143,13 +147,6 @@ func (s *Server) DeviceAuthorization(ctx context.Context, r *op.ClientRequest[oi
 	return s.LegacyServer.DeviceAuthorization(ctx, r)
 }
 
-func (s *Server) VerifyClient(ctx context.Context, r *op.Request[op.ClientCredentials]) (_ op.Client, err error) {
-	ctx, span := tracing.NewSpan(ctx)
-	defer func() { span.EndWithError(err) }()
-
-	return s.LegacyServer.VerifyClient(ctx, r)
-}
-
 func (s *Server) CodeExchange(ctx context.Context, r *op.ClientRequest[oidc.AccessTokenRequest]) (_ *op.Response, err error) {
 	ctx, span := tracing.NewSpan(ctx)
 	defer func() { span.EndWithError(err) }()