feat: switch to local full surge sync and local merge-convert pipeline

config.example.toml

@@ -6,7 +6,11 @@ ref = "main"
 token_env = "GITEA_TOKEN"
 
 [source]
-# Usually this is where Surge source rules are stored in your Gitea repo.
+# mode=gitea: read source via Gitea API
+# mode=local: read source from local filesystem cache (recommended with sync script)
+mode = "local"
+local_root = "upstream"
+# Usually this is where Surge source rules are stored.
 root = "rule/Surge"
 filename_pattern = "{name}.list"
 include_categories = []