Initial commit: SQL audit platform v0.1.0

FastAPI backend with auth, user, instance, ticket, query, dashboard APIs.
React + TypeScript frontend with mock data UI (10 pages).
SQLite + async SQLAlchemy, JWT auth, role-based access control.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/app/schemas/instance.py

@@ -0,0 +1,50 @@
+from datetime import datetime
+from pydantic import BaseModel, Field
+from typing import Optional, Literal
+
+
+class InstanceCreate(BaseModel):
+    name: str = Field(..., min_length=1, max_length=100)
+    db_type: Literal["mysql", "postgres", "redis", "mongo"]
+    host: str = Field(..., min_length=1)
+    port: int = Field(..., ge=1, le=65535)
+    username: str = Field(..., min_length=1)
+    password: str = Field(..., min_length=1)
+    database: Optional[str] = None
+    env: Literal["production", "staging", "development"] = "development"
+    description: Optional[str] = None
+
+
+class InstanceUpdate(BaseModel):
+    name: Optional[str] = None
+    host: Optional[str] = None
+    port: Optional[int] = Field(default=None, ge=1, le=65535)
+    username: Optional[str] = None
+    password: Optional[str] = None
+    database: Optional[str] = None
+    env: Optional[Literal["production", "staging", "development"]] = None
+    description: Optional[str] = None
+
+
+class InstanceResponse(BaseModel):
+    id: int
+    name: str
+    db_type: str
+    host: str
+    port: int
+    username: str
+    database: Optional[str] = None
+    env: str
+    description: Optional[str] = None
+    status: str
+    version: Optional[str] = None
+    created_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class ConnectionTestResult(BaseModel):
+    success: bool
+    message: str
+    version: Optional[str] = None