fix: inaccruate 401 & sql busy error (#679)

* fix inaccruate 401 error on SQL db error

* init golangci-lint config

* linter autofix

* testify auto fixes

* fix sqlite busy errors

* fix naming

* more linter errors

* fix rest of linter issues

Former-commit-id: e8449b3a7363a6cfd5bc6151609e6d2d94b4f7d8

backend/internal/sys/validate/validate.go

@@ -1,3 +1,4 @@
+// Package validate provides a wrapper around the go-playground/validator package
 package validate
 
 import (
@@ -8,7 +9,7 @@ import (
 
 var validate *validator.Validate
 
-func init() {
+func init() { // nolint
 	validate = validator.New()
 
 	err := validate.RegisterValidation("shoutrrr", func(fl validator.FieldLevel) bool {
@@ -52,17 +53,16 @@ func init() {
 	if err != nil {
 		panic(err)
 	}
-
 }
 
-// Checks a struct for validation errors and returns any errors the occur. This
+// Check a struct for validation errors and returns any errors the occur. This
 // wraps the validate.Struct() function and provides some error wrapping. When
 // a validator.ValidationErrors is returned, it is wrapped transformed into a
 // FieldErrors array and returned.
 func Check(val any) error {
 	err := validate.Struct(val)
 	if err != nil {
-		verrors, ok := err.(validator.ValidationErrors)
+		verrors, ok := err.(validator.ValidationErrors) // nolint - we know it's a validator.ValidationErrors
 		if !ok {
 			return err
 		}