项目目录从 refer 迁移到 local

Co-Authored-By: Claude <noreply@anthropic.com>

local/backend/app/data_providers/registry.py

@@ -0,0 +1,15 @@
+"""Provider registry."""
+from __future__ import annotations
+
+from app.data_providers.tickflow_provider import TickFlowProvider
+
+_PROVIDERS = {
+    "tickflow": TickFlowProvider,
+}
+
+
+def get_provider(name: str = "tickflow"):
+    provider_cls = _PROVIDERS.get((name or "tickflow").lower())
+    if provider_cls is None:
+        raise ValueError(f"Unsupported data provider: {name}")
+    return provider_cls()