feat: organize tools and enable qwen realtime calls

backend/db/models.py

@@ -10,6 +10,7 @@
 from datetime import datetime
 
 from sqlalchemy import (
+    CheckConstraint,
     JSON,
     Boolean,
     DateTime,
@@ -175,6 +176,7 @@ class Assistant(Base):
     # ---- 瘦类型专属字段(真列,稀疏:按 type 用其中几列) ----
     prompt: Mapped[str] = mapped_column(Text, default="")    # prompt / opencode
     dynamic_variable_definitions: Mapped[dict] = mapped_column(JSON, default=dict)
+    built_in_tools: Mapped[dict] = mapped_column(JSONB, default=dict)
     analysis_config: Mapped[dict] = mapped_column(JSONB, default=dict)
     api_url: Mapped[str] = mapped_column(String(512), default="")    # dify / fastgpt / opencode
     api_key: Mapped[str] = mapped_column(String(512), default="")    # dify / fastgpt / opencode(打码/哨兵)
@@ -245,6 +247,10 @@ class Tool(Base):
             "remote_tool_name",
             name="uq_tools_mcp_server_remote_name",
         ),
+        CheckConstraint(
+            "type IN ('http', 'mcp', 'client')",
+            name="ck_tools_external_type",
+        ),
     )
 
     id: Mapped[str] = mapped_column(String(40), primary_key=True)
@@ -273,7 +279,7 @@ class Tool(Base):
 
 
 class AssistantToolBinding(Base):
-    """Prompt assistant to reusable tool many-to-many binding."""
+    """Assistant reference to a reusable tool plus Prompt usage config."""
 
     __tablename__ = "assistant_tool_bindings"
 
@@ -288,6 +294,7 @@ class AssistantToolBinding(Base):
         primary_key=True,
         index=True,
     )
+    config: Mapped[dict] = mapped_column(JSONB, default=dict)
     created_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), server_default=func.now()
     )