feat(gh-copilot): add AI credit usage billing metrics and fix report-body double-read#9019

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apache:mainapache/devlake:mainfrom

PankajChaudhari-Atos:feat-gh-copilot-ai-credit-and-report-fixPankajChaudhari-Atos/devlake:feat-gh-copilot-ai-credit-and-report-fixCopy head branch name to clipboard