fix: Allow up to 1000 characters for label description (#948)

The database schema already supports 1,000 characters for label
description, so this seems just like an oversight.

backend/app/api/static/docs/docs.go

@@ -3639,7 +3639,7 @@ const docTemplate = `{
                 },
                 "description": {
                     "type": "string",
-                    "maxLength": 255
+                    "maxLength": 1000
                 },
                 "name": {
                     "type": "string",

backend/app/api/static/docs/swagger.json

@@ -3637,7 +3637,7 @@
                 },
                 "description": {
                     "type": "string",
-                    "maxLength": 255
+                    "maxLength": 1000
                 },
                 "name": {
                     "type": "string",

backend/app/api/static/docs/swagger.yaml

@@ -1012,7 +1012,7 @@ definitions:
       color:
         type: string
       description:
-        maxLength: 255
+        maxLength: 1000
         type: string
       name:
         maxLength: 255

backend/internal/data/repo/repo_labels.go

@@ -20,14 +20,14 @@ type LabelRepository struct {
 type (
 	LabelCreate struct {
 		Name        string `json:"name"        validate:"required,min=1,max=255"`
-		Description string `json:"description" validate:"max=255"`
+		Description string `json:"description" validate:"max=1000"`
 		Color       string `json:"color"`
 	}
 
 	LabelUpdate struct {
 		ID          uuid.UUID `json:"id"`
 		Name        string    `json:"name"        validate:"required,min=1,max=255"`
-		Description string    `json:"description" validate:"max=255"`
+		Description string    `json:"description" validate:"max=1000"`
 		Color       string    `json:"color"`
 	}