⚡ Bolt: [performance improvement] Eliminate expensive Serde deep clones in OpenAPI parser

[cloudesize67-cmd]

💡 What: Replaced intermediate variable cloning in xdk-openapi/src/parser.rs with ::deserialize(val) to avoid serde_yaml::from_value(val.clone()) overhead.
🎯 Why: Deep cloning serde_json::Value and serde_yaml::Value constructs (which contains nested HashMaps and Vecs representing OpenAPI specifications) just to deserialize it is very slow and wastes memory.
📊 Impact: Directly deserializing from references significantly speeds up the SDK generation for large API schema, eliminating unnecessary intermediate object allocations.
🔬 Measurement: Verify changes via cargo test and make check suites. Code correctly resolves without deep clones.

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PR created automatically by Jules for task 3379428395105184383 started by @cloudesize67-cmd

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