fix: Case-insensitive repo sorting in groups

Changed ORDER BY clauses in get_group_repos() and get_repo_groups()
to use COLLATE NOCASE for case-insensitive sorting, matching how
golden repos are sorted elsewhere in the codebase.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jsbattig

src/code_indexer/server/services/group_access_manager.py

@@ -767,7 +767,7 @@ def get_group_repos(self, group_id: int) -> List[str]:
                 """
                 SELECT repo_name FROM repo_group_access
                 WHERE group_id = ?
-                ORDER BY repo_name
+                ORDER BY repo_name COLLATE NOCASE
             """,
                 (group_id,),
             )
@@ -804,7 +804,7 @@ def get_repo_groups(self, repo_name: str) -> List[Group]:
                 SELECT g.* FROM groups g
                 JOIN repo_group_access rga ON g.id = rga.group_id
                 WHERE rga.repo_name = ?
-                ORDER BY g.name
+                ORDER BY g.name COLLATE NOCASE
             """,
                 (repo_name,),
             )