refactor(errs): migrate from gperr.Error to standard Go error interface

This is a large-scale refactoring across the codebase that replaces the custom
`gperr.Error` type with Go's standard `error` interface. The changes include:

- Replacing `gperr.Error` return types with `error` in function signatures
- Using `errors.New()` and `fmt.Errorf()` instead of `gperr.New()` and `gperr.Errorf()`
- Using `%w` format verb for error wrapping instead of `.With()` method
- Replacing `gperr.Subject()` calls with `gperr.PrependSubject()`
- Converting error logging from `gperr.Log*()` functions to zerolog's `.Err().Msg()` pattern
- Update NewLogger to handle multiline error message
- Updating `goutils` submodule to latest commit

This refactoring aligns with Go idioms and removes the dependency on
custom error handling abstractions in favor of standard library patterns.

internal/autocert/config.go

@@ -66,13 +66,13 @@ const (
 
 var domainOrWildcardRE = regexp.MustCompile(`^\*?([^.]+\.)+[^.]+$`)
 
-// Validate implements the utils.CustomValidator interface.
-func (cfg *Config) Validate() gperr.Error {
+// Validate implements the serialization.CustomValidator interface.
+func (cfg *Config) Validate() error {
 	seenPaths := make(map[string]int) // path -> provider idx (0 for main, 1+ for extras)
 	return cfg.validate(seenPaths)
 }
 
-func (cfg *ConfigExtra) Validate() gperr.Error {
+func (cfg *ConfigExtra) Validate() error {
 	return nil // done by main config's validate
 }
 
@@ -80,7 +80,7 @@ func (cfg *ConfigExtra) AsConfig() *Config {
 	return (*Config)(cfg)
 }
 
-func (cfg *Config) validate(seenPaths map[string]int) gperr.Error {
+func (cfg *Config) validate(seenPaths map[string]int) error {
 	if cfg.Provider == "" {
 		cfg.Provider = ProviderLocal
 	}
@@ -157,7 +157,7 @@ func (cfg *Config) validate(seenPaths map[string]int) gperr.Error {
 			cfg.Extra[i].AsConfig().idx = i + 1
 			err := cfg.Extra[i].AsConfig().validate(seenPaths)
 			if err != nil {
-				b.Add(err.Subjectf("extra[%d]", i))
+				b.AddSubjectf(err, "extra[%d]", i)
 			}
 		}
 	}
@@ -179,10 +179,10 @@ func (cfg *Config) GetLegoConfig() (*User, *lego.Config, error) {
 			log.Info().Err(err).Msg("failed to load ACME private key, generating a now one")
 			privKey, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
 			if err != nil {
-				return nil, nil, gperr.New("generate ACME private key").With(err)
+				return nil, nil, fmt.Errorf("generate ACME private key: %w", err)
 			}
 			if err = cfg.SaveACMEKey(privKey); err != nil {
-				return nil, nil, gperr.New("save ACME private key").With(err)
+				return nil, nil, fmt.Errorf("save ACME private key: %w", err)
 			}
 		}
 	}
@@ -206,7 +206,7 @@ func (cfg *Config) GetLegoConfig() (*User, *lego.Config, error) {
 	if len(cfg.CACerts) > 0 {
 		certPool, err := lego.CreateCertPool(cfg.CACerts, true)
 		if err != nil {
-			return nil, nil, gperr.New("failed to create cert pool").With(err)
+			return nil, nil, fmt.Errorf("failed to create cert pool: %w", err)
 		}
 		legoCfg.HTTPClient.Transport.(*http.Transport).TLSClientConfig.RootCAs = certPool
 	}

internal/autocert/provider.go

@@ -150,7 +150,7 @@ func (p *Provider) GetName() string {
 }
 
 func (p *Provider) fmtError(err error) error {
-	return gperr.PrependSubject(fmt.Sprintf("provider: %s", p.GetName()), err)
+	return gperr.PrependSubject(err, "provider: "+p.GetName())
 }
 
 func (p *Provider) GetCertPath() string {
@@ -216,7 +216,7 @@ func (p *Provider) ObtainCertIfNotExistsAll() error {
 	for _, provider := range p.allProviders() {
 		errs.Go(func() error {
 			if err := provider.obtainCertIfNotExists(); err != nil {
-				return fmt.Errorf("failed to obtain cert for %s: %w", provider.GetName(), err)
+				return gperr.PrependSubject(err, provider.GetName())
 			}
 			return nil
 		})
@@ -475,7 +475,7 @@ func (p *Provider) scheduleRenewal(parent task.Parent) {
 
 		renewed, err := p.renew(renewMode)
 		if err != nil {
-			gperr.LogWarn("autocert: cert renew failed", p.fmtError(err))
+			log.Warn().Err(p.fmtError(err)).Msg("autocert: cert renew failed")
 			notif.Notify(&notif.LogMessage{
 				Level: zerolog.ErrorLevel,
 				Title: fmt.Sprintf("SSL certificate renewal failed for %s", p.GetName()),
@@ -494,7 +494,7 @@ func (p *Provider) scheduleRenewal(parent task.Parent) {
 
 			// Reset on success
 			if err := p.ClearLastFailure(); err != nil {
-				gperr.LogWarn("autocert: failed to clear last failure", p.fmtError(err))
+				log.Warn().Err(p.fmtError(err)).Msg("autocert: failed to clear last failure")
 			}
 			timer.Reset(time.Until(p.ShouldRenewOn()))
 		}

internal/autocert/providers.go

@@ -3,11 +3,10 @@ package autocert
 import (
 	"github.com/go-acme/lego/v4/challenge"
 	"github.com/yusing/godoxy/internal/serialization"
-	gperr "github.com/yusing/goutils/errs"
 	strutils "github.com/yusing/goutils/strings"
 )
 
-type Generator func(map[string]strutils.Redacted) (challenge.Provider, gperr.Error)
+type Generator func(map[string]strutils.Redacted) (challenge.Provider, error)
 
 var Providers = make(map[string]Generator)
 
@@ -15,7 +14,7 @@ func DNSProvider[CT any, PT challenge.Provider](
 	defaultCfg func() *CT,
 	newProvider func(*CT) (PT, error),
 ) Generator {
-	return func(opt map[string]strutils.Redacted) (challenge.Provider, gperr.Error) {
+	return func(opt map[string]strutils.Redacted) (challenge.Provider, error) {
 		cfg := defaultCfg()
 		if len(opt) > 0 {
 			err := serialization.MapUnmarshalValidate(serialization.ToSerializedObject(opt), &cfg)
@@ -24,6 +23,6 @@ func DNSProvider[CT any, PT challenge.Provider](
 			}
 		}
 		p, pErr := newProvider(cfg)
-		return p, gperr.Wrap(pErr)
+		return p, pErr
 	}
 }

internal/autocert/setup.go

@@ -4,7 +4,7 @@ import (
 	gperr "github.com/yusing/goutils/errs"
 )
 
-func (p *Provider) setupExtraProviders() gperr.Error {
+func (p *Provider) setupExtraProviders() error {
 	p.sniMatcher = sniMatcher{}
 	if len(p.cfg.Extra) == 0 {
 		return nil