feat: 项目重命名 SQL-Platform + 数据源表单重写(连接模式/流程/排除DB/脱敏)

- 项目名称 Web-Lite Pro → SQL-Platform 全局替换(13处)
- Instance 模型新增: access_mode, workflow, excluded_databases, mask_fields
- 创建数据源表单: 分区卡片(数据源信息/连接模式/流程/高级配置)
- 后端 JSON 字段序列化/反序列化
- 新增 5 个 Instance 字段测试 (133 total)

backend/app/schemas/instance.py

@@ -1,6 +1,18 @@
 from datetime import datetime
 from pydantic import BaseModel, Field
-from typing import Optional, Literal
+from typing import Optional, Literal, List, Any
+
+
+class WorkflowStage(BaseModel):
+    stage: str = Field(..., description="阶段名称，如：提交阶段、审核阶段、执行阶段")
+    role: str = Field(..., description="角色，如：提交人、开发负责人、执行人")
+    assignee: Optional[str] = Field(None, description="负责人用户名")
+
+
+class MaskFieldRule(BaseModel):
+    table: str = Field(..., description="表名")
+    field: str = Field(..., description="字段名")
+    rule: str = Field(default="mask", description="脱敏规则：mask/hide/hash")
 
 
 class InstanceCreate(BaseModel):
@@ -13,6 +25,10 @@ class InstanceCreate(BaseModel):
     database: Optional[str] = None
     env: Literal["production", "staging", "development"] = "development"
     description: Optional[str] = None
+    access_mode: Literal["readwrite", "read", "write"] = "readwrite"
+    workflow: Optional[List[WorkflowStage]] = None
+    excluded_databases: Optional[List[str]] = None
+    mask_fields: Optional[List[MaskFieldRule]] = None
 
 
 class InstanceUpdate(BaseModel):
@@ -24,6 +40,10 @@ class InstanceUpdate(BaseModel):
     database: Optional[str] = None
     env: Optional[Literal["production", "staging", "development"]] = None
     description: Optional[str] = None
+    access_mode: Optional[Literal["readwrite", "read", "write"]] = None
+    workflow: Optional[List[WorkflowStage]] = None
+    excluded_databases: Optional[List[str]] = None
+    mask_fields: Optional[List[MaskFieldRule]] = None
 
 
 class InstanceResponse(BaseModel):
@@ -38,6 +58,10 @@ class InstanceResponse(BaseModel):
     description: Optional[str] = None
     status: str
     version: Optional[str] = None
+    access_mode: str = "readwrite"
+    workflow: Optional[List[dict]] = None
+    excluded_databases: Optional[List[str]] = None
+    mask_fields: Optional[List[dict]] = None
     created_at: datetime
 
     class Config: