⚡ Bolt: [performance improvement]

[cloudesize67-cmd]

💡 What: Replaced intermediate allocations in xdk-build/src/python.rs by chaining iterators directly. Replaced .split("\n").collect::<Vec<&str>>().into_iter() with .split('\n') and replaced line.split(" ").collect::<Vec<&str>>() with direct pattern matching on iterator .next() calls. Also switched string split delimiters ("\n", " ") to character delimiters ('\n', ' ').

🎯 Why: To eliminate unnecessary heap allocations for vector intermediate collections during command output logging, which reduces memory pressure and execution time.

📊 Impact: Reduces intermediate memory allocations in the logging block, allowing the iterator sequence to process directly over the original string buffer and avoiding creating temporary Vecs of strings.

🔬 Measurement: Verifiable by the complete absence of .collect::<Vec<&str>>() in xdk-build/src/python.rs and successful execution of the test suite without behavioral regressions. Run make check and make test-generator.

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PR created automatically by Jules for task 8654873983623434056 started by @cloudesize67-cmd

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