server.py: use generators where it makes sense

It's only used in cases where there is significant copying and big
objects, in other cases list comprehensions are fine

Author: diaasami

server.py

@@ -2,6 +2,7 @@
 
 import os
 import argparse
+import types
 from dotenv import load_dotenv
 from jira import JIRA
 from fastmcp import FastMCP
@@ -52,8 +53,8 @@ def to_markdown(obj):
         return '```json\n' + json.dumps(obj, indent=2) + '\n```'
     elif hasattr(obj, 'raw'):
         return '```json\n' + json.dumps(obj.raw, indent=2) + '\n```'
-    elif isinstance(obj, list):
-        return '\n'.join([to_markdown(o) for o in obj])
+    elif isinstance(obj, list) or isinstance(obj, types.GeneratorType):
+        return '\n'.join((to_markdown(o) for o in obj))
     else:
         return str(obj)
 
@@ -79,7 +80,7 @@ def simplify_issue(issue):
 
     try:
         issues = jira_client.search_issues(jql, maxResults=max_results)
-        return to_markdown([simplify_issue(issue) for issue in issues])
+        return to_markdown((simplify_issue(issue) for issue in issues))
     except Exception as e:
         raise HTTPException(status_code=400, detail=f"JQL search failed: {e}")
 
@@ -306,7 +307,7 @@ def simplify_comment(comment):
         }
     try:
         issue = jira_client.issue(issue_key)
-        return to_markdown([simplify_comment(c) for c in issue.fields.comment.comments])
+        return to_markdown((simplify_comment(c) for c in issue.fields.comment.comments))
     except Exception as e:
         raise HTTPException(status_code=400, detail=f"Failed to get comments for {issue_key}: {e}")