[SPARK-56846][DOCS][CONNECT] Document DataFrame column resolution behavior in spark-connect-gotchas#55848

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Commits on May 13, 2026

[DOCS][CONNECT] Document DataFrame column resolution behavior in spark-connect-gotchas
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Rename example column from 'col' to 'c' to avoid confusion with F.col()
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Use 'sf' alias for pyspark.sql.functions in new gotcha section
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Reference strictDataFrameColumnResolution config inline in section 5
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Use integer literal in section 5 examples so cast('string') is meaningful
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Restructure strict-Connect bullet to contrast strict and lenient modes
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Clarify lenient mode tries plan-id first, then falls back to name-based
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Reframe section 5 mitigation as 'Recommended way' to switch to sf.col
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Shorten DataFrame column references row to Eager vs Lazy/plan-id
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Commits on May 14, 2026

Address review: drop gotcha count and qualify col reference in prose
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