feat(plugin): add CheckmarxOne data source plugin (#8869)

[bujjibabukatta]

Summary

This PR implements a complete CheckmarxOne data source plugin for Apache DevLake (resolves #8869).

The plugin enables security teams to integrate CheckmarxOne SAST scanning results into DevLake pipelines, allowing them to:

• Track and follow security issues discovered by CheckmarxOne
• Provide KPIs around findings, triage, and remediation
• Monitor vulnerability severity and remediation progress
• Support DevSecOps practices with security-focused metrics

Motivation

With the rising importance of DevSecOps, organizations need to track security vulnerabilities alongside development metrics. This plugin provides seamless integration with CheckmarxOne, a leading code security scanning platform, enabling teams to establish meaningful performance indicators around security vulnerability remediation.

Changes

Plugin Structure

• Entry Point: checkmarxone.go - Main plugin entry point with CLI support
• Implementation: impl/impl.go - Core plugin logic implementing all required interfaces
• Models: Connection, Project, and Finding data models
• API Client: OAuth-based authentication and API communication
• Tasks: Collector and extractor for findings data
• API Endpoints: REST endpoints for connection management
• Migrations: Database schema setup

Data Models

CheckmarxoneConnection

• Server URL, Client ID/Secret for OAuth
• Secure credential storage (passwords hidden in JSON)

CheckmarxoneProject

• Project ID and metadata
• Connection association

CheckmarxoneFinding

• Vulnerability data: ID, name, severity, status
• First/Last found timestamps
• Finding type and count

Features

✅ OAuth authentication with automatic token refresh
✅ Multi-project support with separate data collection
✅ Vulnerability severity tracking (Critical, High, Medium, Low)
✅ Remediation status monitoring
✅ REST API for connection CRUD operations
✅ Automatic database migrations
✅ Comprehensive error handling and logging
✅ Resource cleanup and connection management

Data Flow