feat: 新增风险图谱算法与系统仪表盘及操作反馈体系

后端新增风险图谱算法模块、风险观察与反馈服务、规则 DSL
校验器和可解释性引擎，完善系统仪表盘和财务仪表盘统计，
优化 agent 运行和编排执行链路，清理旧开发文档，前端新增
系统趋势、负载热力图等多种仪表盘图表组件，完善操作反馈
对话框和工作台日期选择器，优化报销创建和审批详情交互，
补充单元测试覆盖。

server/src/app/models/__init__.py

@@ -1,5 +1,6 @@
 from app.models.agent_conversation import AgentConversation, AgentConversationMessage
 from app.models.agent_asset import AgentAsset, AgentAssetReview, AgentAssetVersion
+from app.models.agent_feedback import AgentOperationFeedback
 from app.models.agent_run import AgentRun, AgentToolCall, SemanticParseLog
 from app.models.approval import ApprovalRecord
 from app.models.audit_log import AuditLog
@@ -17,10 +18,12 @@ from app.models.hermes_config import HermesTaskConfig, HermesTaskExecutionLog
 from app.models.hermes_report import HermesRiskReport
 from app.models.organization import OrganizationUnit
 from app.models.reimbursement import ReimbursementRequest
+from app.models.risk_observation import RiskObservation, RiskObservationFeedback
 from app.models.role import Role
 from app.models.system_model_setting import SystemModelSetting
 from app.models.system_setting import SystemSetting
 from app.models.system_setting_secret import SystemSettingSecret
+from app.models.user_session_metric import UserSessionMetric
 
 __all__ = [
     "AccountsPayableRecord",
@@ -30,6 +33,7 @@ __all__ = [
     "AgentAsset",
     "AgentAssetReview",
     "AgentAssetVersion",
+    "AgentOperationFeedback",
     "AgentRun",
     "AgentToolCall",
     "ApprovalRecord",
@@ -47,9 +51,12 @@ __all__ = [
     "HermesRiskReport",
     "OrganizationUnit",
     "ReimbursementRequest",
+    "RiskObservation",
+    "RiskObservationFeedback",
     "Role",
     "SemanticParseLog",
     "SystemModelSetting",
     "SystemSetting",
     "SystemSettingSecret",
+    "UserSessionMetric",
 ]