Model aliases deepseek

Model Alias	Maps to
`deepseek`	`deepseek.deepseek-v4-pro`
`deepseek-chat`	`deepseek-chat`
`deepseek-direct`	`deepseek.deepseek-v4-pro`
`deepseek-reasoner`	`deepseek.deepseek-reasoner`
`deepseek-v4-flash`	`deepseek-v4-flash`
`deepseek-v4-pro`	`deepseek-v4-pro`
`deepseek3`	`deepseek-chat`
`deepseek4`	`deepseek.deepseek-v4-pro`
`deepseek4flash`	`deepseek.deepseek-v4-flash`
`deepseek4pro`	`deepseek.deepseek-v4-pro`
`deepseek4pro-direct`	`deepseek.deepseek-v4-pro`
`deepseekv3`	`deepseek-chat`
`deepseekv4pro`	`deepseek.deepseek-v4-pro`