feat: add governed public knowledge retrieval

app/service/agent/bootstrap.py

@@ -7,6 +7,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from app.core.config import get_settings
 from app.core.errors import RecoverableAgentError
 from app.core.fund_contracts import FundQuoteQuery
+from app.core.knowledge_contracts import KnowledgeQuery
 from app.core.nl2sql_contracts import FinancialNL2SQLInput
 from app.infrastructure.fund_quote_cache import FundQuoteCache
 from app.infrastructure.memory_cache import MemoryCacheAdapter
@@ -18,6 +19,7 @@ from app.service.agent.offsite_fund_agent import OffsiteFundAgent
 from app.service.financial_nl2sql_service import query_financial_data_tool
 from app.service.fund_quote_service import query_fund_quote_tool
 from app.service.intent_classifier import IntentClassifier
+from app.service.knowledge_tool_service import query_knowledge_tool
 from app.service.memory_recall_service import MemoryRecallService
 from app.service.model_gateway import (
     DatabaseModelEndpointResolver,
@@ -154,6 +156,15 @@ def get_agent_factory() -> AgentFactory:
         allowed_roles=("advisor", "operator", "admin", "super_admin"),
         timeout_seconds=10,
     ))
+    registry.register(ToolDefinition(
+        name="query_knowledge",
+        input_model=KnowledgeQuery,
+        handler=cast(Any, query_knowledge_tool),
+        required_permission="knowledge:query",
+        allowed_roles=("visitor", "customer"),
+        # 15 秒向量端点预算外预留检索和权威回查时间，防止正常降级被工具层提前中断。
+        timeout_seconds=20,
+    ))
     model_service = get_model_service()
     endpoint_resolver = DatabaseModelEndpointResolver()
     factory = AgentFactory(