fix: fix missing oceanbase config enable_hybrid_search init (#16852)

Co-authored-by: 李远军 <4842@9ji.com>

api/core/rag/datasource/vdb/oceanbase/oceanbase_vector.py

                 user=dify_config.OCEANBASE_VECTOR_USER or "",
                 password=(dify_config.OCEANBASE_VECTOR_PASSWORD or ""),
                 database=dify_config.OCEANBASE_VECTOR_DATABASE or "",
+                enable_hybrid_search=dify_config.OCEANBASE_ENABLE_HYBRID_SEARCH or False,
             ),
         )