refactor(lib): physically copy sqlite DBs instead of symlinking for cline

- Prevent sqlite DB locking errors across concurrent isolated sessions
- Use cp -p for files inside data/db/ during provision_isolation

.agents/skills/lib.sh

@@ -812,7 +812,9 @@ provision_isolation() {
       for f in "$HOME/.cline/data/db/"*; do
         [ -e "$f" ] || continue
         base="$(basename "$f")"
-        ln -sfn "$f" "$root/data/db/$base"; seeded="${seeded:+$seeded,}data/db/$base"
+        # DB 락 경쟁 크래시 방지를 위해 심볼릭 링크가 아닌 물리 복사(cp -p) 수행
+        cp -p "$f" "$root/data/db/$base"
+        seeded="${seeded:+$seeded,}data/db/$base"
       done
       ;;
     agy)