Fix 'qmk generate-develop-pr-list' for ghapi v2 (#26428)

lib/python/qmk/cli/generate/develop_pr_list.py

@@ -39,7 +39,12 @@ def _try_open_cache(cli):
         return None
 
     cache_loc = Path(cli.config_file).parent
-    return SqliteCache(cache_loc)
+    cache = SqliteCache(cache_loc)
+
+    if cli.args.clean:
+        cache.clear()
+
+    return cache
 
 
 def _get_github():
@@ -48,9 +53,11 @@ def _get_github():
     except ImportError:
         return None
 
-    return GhApi()
+    # ghapi v2 (July 2026) is now async by default - luckily v1 happily ignores the sync argument
+    return GhApi(sync=True)
 
 
+@cli.argument('-c', '--clean', arg_only=True, action='store_true', help="Remove cache before list generation.")
 @cli.argument('-f', '--from-ref', default='0.11.0', help='Git revision/tag/reference/branch to begin search')
 @cli.argument('-b', '--branch', default='upstream/develop', help='Git branch to iterate (default: "upstream/develop")')
 @cli.subcommand('Creates the develop PR list.', hidden=False if cli.config.user.developer else True)