[main] chore: bump version to v1.0.53

Image files in GitLab MR discussions use x/y coordinates instead of line numbers. This fix allows proper handling of image diff comments.

Co-authored-by: Peter Xu <px.peter.xu@gmail.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@zereight/mcp-gitlab",
-  "version": "1.0.52",
+  "version": "1.0.53",
   "description": "MCP server for using the GitLab API",
   "license": "MIT",
   "author": "zereight",

schemas.ts

@@ -618,21 +618,21 @@ export const GitLabDiscussionNoteSchema = z.object({
       old_path: z.string(),
       new_path: z.string(),
       position_type: z.enum(["text", "image", "file"]),
-      old_line: z.number().nullable(),
+      old_line: z.number().nullish(), // This is missing for image diffs
-      new_line: z.number().nullable(),
+      new_line: z.number().nullish(), // This is missing for image diffs
       line_range: z
         .object({
           start: z.object({
             line_code: z.string(),
             type: z.enum(["new", "old", "expanded"]),
-            old_line: z.number().nullable(),
+            old_line: z.number().nullish(), // This is missing for image diffs
-            new_line: z.number().nullable(),
+            new_line: z.number().nullish(), // This is missing for image diffs
           }),
           end: z.object({
             line_code: z.string(),
             type: z.enum(["new", "old", "expanded"]),
-            old_line: z.number().nullable(),
+            old_line: z.number().nullish(), // This is missing for image diffs
-            new_line: z.number().nullable(),
+            new_line: z.number().nullish(), // This is missing for image diffs
           }),
         })
         .nullable()