Gitignore .claude/ and run sync every 15 minutes

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

.github/workflows/sync-pr-data.yml

@@ -3,7 +3,7 @@ name: Sync PR Data
 on:
   workflow_dispatch:
   schedule:
-    - cron: '0 */2 * * *'
+    - cron: '*/15 * * * *'
 
 permissions:
   contents: read

.gitignore

@@ -5,3 +5,4 @@ data/
 *.db
 *.db-wal
 *.db-shm
+.claude/