BarChart is not have boundary fit, is have in line chart for clipData.

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Start by comparing the BarChart and LineChart implementations in fl_chart, focusing on how clipData boundary fitting is handled. The issue names no files or tests, so first locate the existing LineChart behavior and clarify the expected BarChart boundaries. Done means BarChart supports the requested boundary fit consistently with LineChart and has coverage for the behavior.

Written by the indexing model from the issue text.