Fix American equity option spot input handling - #329
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domokane merged 2 commits intoOct 2, 2026
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Closes #328. Normalize scalar stock representations and evaluate vector stocks elementwise so American option valuation returns every price rather than indexing a scalar or dropping vector elements.
Added five Python/NumPy scalar representations and two American call/put vector cases against the actual tree model, including the contract multiplier. These seven additions and four existing pricing tests pass (11 tests). The CRLF-aware Git whitespace check passes.