reservoir_registry table의 cache_source view 생성

Create cache_source view for reservoir_registry table to synchronize configuration between manager DB and storage proxy.

JIRA Issue: BA-3152

The issue names only the reservoir_registry table and the cache_source view; it provides no file, migration, test, or entry point. Start by locating the schema or migration definitions for reservoir_registry and related views, then verify that the new view synchronizes manager DB configuration with the storage proxy.

Written by the indexing model from the issue text.