feat: Add Clickzetta Lakehouse vector database integration (#22551)

Co-authored-by: Claude <noreply@anthropic.com>

api/configs/middleware/vdb/clickzetta_config.py

@@ -0,0 +1,69 @@
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+
+class ClickzettaConfig(BaseModel):
+    """
+    Clickzetta Lakehouse vector database configuration
+    """
+
+    CLICKZETTA_USERNAME: Optional[str] = Field(
+        description="Username for authenticating with Clickzetta Lakehouse",
+        default=None,
+    )
+
+    CLICKZETTA_PASSWORD: Optional[str] = Field(
+        description="Password for authenticating with Clickzetta Lakehouse",
+        default=None,
+    )
+
+    CLICKZETTA_INSTANCE: Optional[str] = Field(
+        description="Clickzetta Lakehouse instance ID",
+        default=None,
+    )
+
+    CLICKZETTA_SERVICE: Optional[str] = Field(
+        description="Clickzetta API service endpoint (e.g., 'api.clickzetta.com')",
+        default="api.clickzetta.com",
+    )
+
+    CLICKZETTA_WORKSPACE: Optional[str] = Field(
+        description="Clickzetta workspace name",
+        default="default",
+    )
+
+    CLICKZETTA_VCLUSTER: Optional[str] = Field(
+        description="Clickzetta virtual cluster name",
+        default="default_ap",
+    )
+
+    CLICKZETTA_SCHEMA: Optional[str] = Field(
+        description="Database schema name in Clickzetta",
+        default="public",
+    )
+
+    CLICKZETTA_BATCH_SIZE: Optional[int] = Field(
+        description="Batch size for bulk insert operations",
+        default=100,
+    )
+
+    CLICKZETTA_ENABLE_INVERTED_INDEX: Optional[bool] = Field(
+        description="Enable inverted index for full-text search capabilities",
+        default=True,
+    )
+
+    CLICKZETTA_ANALYZER_TYPE: Optional[str] = Field(
+        description="Analyzer type for full-text search: keyword, english, chinese, unicode",
+        default="chinese",
+    )
+
+    CLICKZETTA_ANALYZER_MODE: Optional[str] = Field(
+        description="Analyzer mode for tokenization: max_word (fine-grained) or smart (intelligent)",
+        default="smart",
+    )
+
+    CLICKZETTA_VECTOR_DISTANCE_FUNCTION: Optional[str] = Field(
+        description="Distance function for vector similarity: l2_distance or cosine_distance",
+        default="cosine_distance",
+    )