feat: Add OceanBase hybrid search features (#16652)

Co-authored-by: 李远军 <4842@9ji.com>
Co-authored-by: yourchanges <yourchanges@gmail.com>

api/configs/middleware/vdb/oceanbase_config.py

@@ -33,3 +33,9 @@ class OceanBaseVectorConfig(BaseSettings):
         description="Name of the OceanBase Vector database to connect to",
         default=None,
     )
+
+    OCEANBASE_ENABLE_HYBRID_SEARCH: bool = Field(
+        description="Enable hybrid search features (requires OceanBase >= 4.3.5.1). Set to false for compatibility "
+        "with older versions",
+        default=False,
+    )