#3805 test: Test default JSON-formatted `--about` output for taps, targets and mappers Pull request opened by edgarrmondragon Extracted from #3779 Summary by Sourcery Ensure default plugin metadata is stable and isolated while adding regression coverage for JSON

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output. Bug Fixes: • Prevent built-in configuration settings from mutating shared plugin configuration schemas, ensuring consistent default

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output. Tests: • Add snapshot coverage for default JSON-formatted

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output from taps, targets, and mappers. meltano/sdk