Handle qualified asterisk in SELECT

[google-labs-jules]

Implemented support for parsing qualified asterisks (e.g., SELECT table.*) in SQL SELECT statements. This involved extending the AST with a QualifiedAsterisk variant for SelectColumn, enhancing the parser logic to recognize identifiers followed by a dot and an asterisk, and ensuring downstream components like the translator and optimizer can handle the new variant without panicking (though full expansion logic remains TODO as per existing patterns). Verified with unit tests.

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PR created automatically by Jules for task 16790345586847993377 started by @ryancinsight

High-level PR Summary

This PR adds support for parsing qualified asterisk syntax (e.g., SELECT table.*) in SQL SELECT statements. The implementation extends the AST with a new QualifiedAsterisk variant, updates the parser to recognize the pattern of identifier followed by dot and asterisk, and ensures the translator and optimizer handle the new variant gracefully. The full expansion logic for qualified asterisks is left as a TODO, consistent with existing patterns in the codebase.

⏱️ Estimated Review Time: 5-15 minutes

💡 Review Order Suggestion

Order	File Path
1	src/core/query/sql/ast.rs
2	src/core/query/sql/parser/expression.rs
3	src/core/query/sql/tests/parser_tests.rs
4	src/core/query/sql/translator.rs
5	src/core/optimizer/mod.rs

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[recurseml]

Review by RecurseML

🔍 Review performed on 8d5f078..9f05e9b

✨ No bugs found, your code is sparkling clean

✅ Files analyzed, no issues (5)

• src/core/optimizer/mod.rs
• src/core/query/sql/ast.rs
• src/core/query/sql/parser/expression.rs
• src/core/query/sql/tests/parser_tests.rs
• src/core/query/sql/translator.rs