chore: Add triaged-issues.json to gitignore

Local tracking file for issue triage progress.

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

Author: Shaun Prince

.gitignore

@@ -5,3 +5,6 @@ CLAUDE.md
 .claude/
 .mcp.json
 
+# Triage tracking (local only)
+triaged-issues.json
+