refactor(git-hangman-lab): get-latest now uses search API instead of list-all parsing

Replace fragile list-all + awk URL extraction with repo search command
for repo URL lookup. search returns {name,id,owner,clone-url} with
exact match, eliminating column-index dependency.

git-hangman-lab/scripts/repo

@@ -273,13 +273,26 @@ do_get_latest() {
 
     echo "Done: $REPO_DIR updated."
   else
-    # Repo does not exist locally — clone it
-    echo "Repo not found locally. Looking up URL..."
+    # Repo does not exist locally — search via API then clone
+    echo "Repo not found locally. Searching..."
+    local search_result=""
+    search_result=$(bash "$SCRIPT_DIR/repo" search "$REPO_NAME" 2>&1)
+    local search_exit=$?
+
+    if [[ $search_exit -ne 0 ]]; then
+      echo "Error: repository '$REPO_NAME' not found"
+      exit 1
+    fi
+
     local url=""
-    url=$(bash "$SCRIPT_DIR/repo" list-all 2>/dev/null | grep "| $REPO_NAME |" | awk -F'\\|' '{gsub(/^ +| +$/,"",$4); print $4}')
+    url=$(echo "$search_result" | python3 -c "
+import sys, json
+data = json.load(sys.stdin)
+print(data.get('clone-url', ''))
+" 2>/dev/null)
 
     if [[ -z "$url" ]]; then
-      echo "Error: repository '$REPO_NAME' not found in list-all output"
+      echo "Error: failed to parse clone URL for '$REPO_NAME'"
       exit 1
     fi