[MM-61765] Fix errcheck issues in server/channels/app/platform/license.go (#30954)

* [MM-61765] Fix errcheck issues in server/channels/app/platform/license.go

- Removed the errcheck exception for license.go from .golangci.yml
- Added proper error handling for RemoveLicense() calls
- Added proper error handling for ReloadConfig() and InvalidateAllCaches() calls
- Updated variable names to avoid conflicts

🤖 Generated with [Claude Code](https://claude.ai/code)

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

* simplify naming

---------

Co-authored-by: Claude <noreply@anthropic.com>

server/.golangci.yml

@@ -94,7 +94,6 @@ issues:
         channels/app/helper_test.go|\
         channels/app/permissions_test.go|\
         channels/app/platform/helper_test.go|\
-        channels/app/platform/license.go|\
         channels/store/localcachelayer/channel_layer.go|\
         channels/store/localcachelayer/channel_layer_test.go|\
         channels/store/localcachelayer/emoji_layer.go|\

server/channels/app/platform/license.go

@@ -183,15 +183,16 @@ func (ps *PlatformService) SaveLicense(licenseBytes []byte) (*model.License, *mo
 	record.Id = license.Id
 	record.Bytes = string(licenseBytes)
 
-	nErr := ps.Store.License().Save(record)
-	if nErr != nil {
-		ps.RemoveLicense()
+	if err := ps.Store.License().Save(record); err != nil {
+		if appErr := ps.RemoveLicense(); appErr != nil {
+			ps.logger.Error("Failed to remove license after saving it to the license store failed", mlog.Err(appErr))
+		}
 		var appErr *model.AppError
 		switch {
-		case errors.As(nErr, &appErr):
+		case errors.As(err, &appErr):
 			return nil, appErr
 		default:
-			return nil, model.NewAppError("addLicense", "api.license.add_license.save.app_error", nil, "", http.StatusInternalServerError).Wrap(nErr)
+			return nil, model.NewAppError("addLicense", "api.license.add_license.save.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
 		}
 	}
 
@@ -199,8 +200,11 @@ func (ps *PlatformService) SaveLicense(licenseBytes []byte) (*model.License, *mo
 	sysVar.Name = model.SystemActiveLicenseId
 	sysVar.Value = license.Id
 	if err := ps.Store.System().SaveOrUpdate(sysVar); err != nil {
-		ps.RemoveLicense()
-		return nil, model.NewAppError("addLicense", "api.license.add_license.save_active.app_error", nil, "", http.StatusInternalServerError)
+		appErr := ps.RemoveLicense()
+		if appErr != nil {
+			ps.logger.Error("Failed to remove license after saving it to the system store failed", mlog.Err(appErr))
+		}
+		return nil, model.NewAppError("addLicense", "api.license.add_license.save_active.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
 	}
 	// only on prem licenses set this in the first place
 	if !license.IsCloud() {
@@ -210,8 +214,12 @@ func (ps *PlatformService) SaveLicense(licenseBytes []byte) (*model.License, *mo
 		}
 	}
 
-	ps.ReloadConfig()
-	ps.InvalidateAllCaches()
+	if err := ps.ReloadConfig(); err != nil {
+		ps.logger.Warn("Failed to reload config after saving license", mlog.Err(err))
+	}
+	if appErr := ps.InvalidateAllCaches(); appErr != nil {
+		ps.logger.Warn("Failed to invalidate cache after saving license", mlog.Err(appErr))
+	}
 
 	return &license, nil
 }
@@ -295,8 +303,12 @@ func (ps *PlatformService) RemoveLicense() *model.AppError {
 	}
 
 	ps.SetLicense(nil)
-	ps.ReloadConfig()
-	ps.InvalidateAllCaches()
+	if err := ps.ReloadConfig(); err != nil {
+		ps.logger.Warn("Failed to reload config after removing license", mlog.Err(err))
+	}
+	if appErr := ps.InvalidateAllCaches(); appErr != nil {
+		ps.logger.Warn("Failed to invalidate cache after removing license", mlog.Err(appErr))
+	}
 
 	return nil
 }
@@ -352,8 +364,12 @@ func (ps *PlatformService) RequestTrialLicense(trialRequest *model.TrialLicenseR
 		return err
 	}
 
-	ps.ReloadConfig()
-	ps.InvalidateAllCaches()
+	if err := ps.ReloadConfig(); err != nil {
+		ps.logger.Warn("Failed to reload config after requesting trial license", mlog.Err(err))
+	}
+	if appErr := ps.InvalidateAllCaches(); appErr != nil {
+		ps.logger.Warn("Failed to invalidate cache after requesting trial license", mlog.Err(appErr))
+	}
 
 	return nil
 }