feat: golang api

[OrenZhang]

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[Copilot]

Pull Request Overview

This PR represents a complete migration from a Django Python API to a Golang-based API center. The purpose is to implement a new microservices architecture using Go with HTTP, worker, and scheduler services.

• Complete removal of Python/Django codebase and replacement with Go implementation
• Introduction of microservices architecture with HTTP API, async workers, and task scheduling
• Implementation of distributed tracing, Redis integration, and structured logging

Reviewed Changes

Copilot reviewed 128 out of 147 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
main.go	Entry point for the Go application using cobra CLI
internal/cmd/*.go	Command structure for different service modes (api, worker, beat)
internal/httpd/httpd.go	HTTP server implementation with Gin framework
internal/crond/*.go	Async task processing system with Redis backend
pkg/*/**.go	Utility packages for config, logging, tracing, Redis, and Gin helpers
go.mod	Go module definition with dependencies
env.example	Simplified environment configuration for Go app

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