Fix crane hook tie: declare pin/eye coupling explicitly - #432

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claude/kof-214-investigation-d55qnn

Commits on Aug 20, 2026

Declare the pin/hook tie in the crane shell example
claude
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34ec62a
Test that the coupled crane leaves no solid body untied
claude
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5adecc5
Check the load resultant reaches −2000 N before trusting the result
claude
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87c0114