feat: Add API Key support for MCP authentication

- New db model: api_keys table with bcrypt-hashed keys
- New API: POST/GET/DELETE /v3/access/api-keys endpoints
- MCP _resolve_token: validates API keys, resolves to 5-min JWT
- API keys inherit the creating user's RBAC permissions
- MCP auth supports both JWT (24h) and API key (permanent) tokens

gns3server/schemas/controller/tokens.py

@@ -28,3 +28,9 @@ class TokenData(BaseModel):
 
     username: Optional[str] = None
     token_version: int = 0
+
+
+class ApiKeyCreate(BaseModel):
+    """Schema for creating a new API key."""
+
+    name: str