Options to filter threads (Issue #710) (#734)

Adding a few options for filtering threads to
`mcp_ado_repo_list_pull_request_threads`

## GitHub issue number
Fixes #710 

## **Associated Risks**
none

## ✅ **PR Checklist**

- [x] **I have read the [contribution
guidelines](https://github.com/microsoft/azure-devops-mcp/blob/main/CONTRIBUTING.md)**
- [x] **I have read the [code of conduct
guidelines](https://github.com/microsoft/azure-devops-mcp/blob/main/CODE_OF_CONDUCT.md)**
- [x] Title of the pull request is clear and informative.
- [x] 👌 Code hygiene
- [x] 🔭 Telemetry added, updated, or N/A
- [x] 📄 Documentation added, updated, or N/A
- [x] 🛡️ Automated tests added, or N/A

## 🧪 **How did you test it?**

Manually and with added tests

Author: nikolapeja6

src/tools/repositories.ts

@@ -590,17 +590,45 @@ function configureRepoTools(server: McpServer, tokenProvider: () => Promise<stri
       project: z.string().optional().describe("Project ID or project name (optional)"),
       iteration: z.number().optional().describe("The iteration ID for which to retrieve threads. Optional, defaults to the latest iteration."),
       baseIteration: z.number().optional().describe("The base iteration ID for which to retrieve threads. Optional, defaults to the latest base iteration."),
-      top: z.number().default(100).describe("The maximum number of threads to return."),
-      skip: z.number().default(0).describe("The number of threads to skip."),
+      top: z.number().default(100).describe("The maximum number of threads to return after filtering."),
+      skip: z.number().default(0).describe("The number of threads to skip after filtering."),
       fullResponse: z.boolean().optional().default(false).describe("Return full thread JSON response instead of trimmed data."),
+      status: z
+        .enum(getEnumKeys(CommentThreadStatus) as [string, ...string[]])
+        .optional()
+        .describe("Filter threads by status. If not specified, returns threads of all statuses."),
+      authorEmail: z.string().optional().describe("Filter threads by the email of the thread author (first comment author)."),
+      authorDisplayName: z.string().optional().describe("Filter threads by the display name of the thread author (first comment author). Case-insensitive partial matching."),
     },
-    async ({ repositoryId, pullRequestId, project, iteration, baseIteration, top, skip, fullResponse }) => {
+    async ({ repositoryId, pullRequestId, project, iteration, baseIteration, top, skip, fullResponse, status, authorEmail, authorDisplayName }) => {
       const connection = await connectionProvider();
       const gitApi = await connection.getGitApi();
 
       const threads = await gitApi.getThreads(repositoryId, pullRequestId, project, iteration, baseIteration);
 
-      const paginatedThreads = threads?.sort((a, b) => (a.id ?? 0) - (b.id ?? 0)).slice(skip, skip + top);
+      let filteredThreads = threads;
+
+      if (status !== undefined) {
+        const statusValue = CommentThreadStatus[status as keyof typeof CommentThreadStatus];
+        filteredThreads = filteredThreads?.filter((thread) => thread.status === statusValue);
+      }
+
+      if (authorEmail !== undefined) {
+        filteredThreads = filteredThreads?.filter((thread) => {
+          const firstComment = thread.comments?.[0];
+          return firstComment?.author?.uniqueName?.toLowerCase() === authorEmail.toLowerCase();
+        });
+      }
+
+      if (authorDisplayName !== undefined) {
+        const lowerAuthorName = authorDisplayName.toLowerCase();
+        filteredThreads = filteredThreads?.filter((thread) => {
+          const firstComment = thread.comments?.[0];
+          return firstComment?.author?.displayName?.toLowerCase().includes(lowerAuthorName);
+        });
+      }
+
+      const paginatedThreads = filteredThreads?.sort((a, b) => (a.id ?? 0) - (b.id ?? 0)).slice(skip, skip + top);
 
       if (fullResponse) {
         return {