🧹 [Refactor std.database module initialization]

[Tcode-Motion]

🎯 What: Extracted the massive inline closures inside register_database into standalone named functions (std_database_connect, std_database_query, etc.). Additionally, extracted duplicated argument parsing and parameter conversion logic into reusable helper functions (get_params_list and params_list_to_sqlite_params).

💡 Why: The register_database function was excessively long and deeply nested, making it difficult to read and maintain. By extracting the closures and helper functions, the logic is modularized, code duplication is removed, and the register_database function is simplified to just a declarative block of function registrations.

✅ Verification: Verified by ensuring the code compiles with cargo check -p techscript_stdlib and running the full workspace test suite cargo test --workspace which all passed. The behavior of the functions was strictly preserved.

✨ Result: A significant improvement in the maintainability and readability of stdlib/src/database.rs with eliminated code duplication and clearer modular boundaries.

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PR created automatically by Jules for task 13464498606204699825 started by @Tcode-Motion

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