fix(notifications): address claude[bot] review feedback

- Check filter operator (==) when matching subscription to parent config,
  preventing false attribution for inequality filters on job.configuration.id
- Replace fragile strings.Contains("400") error detection with proper
  errors.As(err, &NotificationError) + StatusCode() == 400 check
- Call ValidateNotificationFilters from MapAfterLocalLoad so invalid filter
  field names are caught at load time instead of being dead code
- Sort suggestions in findSimilarFieldNames for deterministic output

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Matovidlo

internal/pkg/mapper/notification/local_load.go

@@ -18,6 +18,8 @@ func (m *mapper) MapAfterLocalLoad(ctx context.Context, recipe *model.LocalLoadR
 	errs := errors.NewMultiError()
 	if err := m.loadConfigFile(ctx, recipe, notification); err != nil {
 		errs.Append(err)
+	} else if err := model.ValidateNotificationFilters(notification.Filters); err != nil {
+		errs.Append(err)
 	}
 	if err := m.loadMetaFile(ctx, recipe); err != nil {
 		errs.Append(err)

internal/pkg/model/notification_validation.go

@@ -2,6 +2,7 @@ package model
 
 import (
 	"slices"
+	"sort"
 	"strings"
 
 	"github.com/keboola/keboola-sdk-go/v2/pkg/keboola"
@@ -110,5 +111,6 @@ func findSimilarFieldNames(input string) []string {
 		}
 	}
 
+	sort.Strings(suggestions)
 	return suggestions
 }

internal/pkg/state/remote/notification.go

@@ -2,7 +2,6 @@ package remote
 
 import (
 	"context"
-	"strings"
 	"time"
 
 	"github.com/keboola/keboola-sdk-go/v2/pkg/keboola"
@@ -36,8 +35,8 @@ func (u *UnitOfWork) loadNotifications(ctx context.Context) error {
 		// Find which config this notification belongs to by checking filters
 		var parentConfig *model.ConfigManifest
 		for _, filter := range apiSub.Filters {
-			if filter.Field == "job.configuration.id" {
-				// Found the config ID filter - look up the config
+			if filter.Field == "job.configuration.id" && filter.Operator == keboola.NotificationFilterOperatorEquals {
+				// Found the config ID equality filter - look up the config
 				configID := keboola.ConfigID(filter.Value)
 				if cfg, found := configsByID[configID]; found {
 					parentConfig = cfg
@@ -143,8 +142,8 @@ func (u *UnitOfWork) buildNotificationCreateRequest(
 ) request.APIRequest[*keboola.NotificationSubscription] {
 	return u.createNotificationRequest(notification).Build().
 		WithOnError(func(_ context.Context, err error) error {
-			errMsg := err.Error()
-			if strings.Contains(errMsg, "400") || strings.Contains(errMsg, "Bad Request") {
+			var notifErr *keboola.NotificationError
+			if errors.As(err, &notifErr) && notifErr.StatusCode() == 400 {
 				return errors.Errorf(
 					`failed to create notification "%s": %w. `+
 						`This may be caused by invalid filter field names. `+