Fix: issue where grouped conditions in block comments were recognized as bind variables

[xterao]

Fixed a bug that caused elements enclosed in parentheses to be recognized as a single variable name.

Modified the BNF to recognize each element within parentheses individually.

[Copilot]

Pull Request Overview

This PR fixes an issue where grouped conditions in SQL block comments were mistakenly recognized as bind variables by updating the BNF grammar and adjusting related parsing and test logic.

• Updated test SQL files to verify the improved handling of function parameters in grouped conditions.
• Modified SQLParser and symbol document test cases to reflect the changes in identification of bind variables.
• Revised the SQL BNF grammar to individually recognize elements within parentheses.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/test/testData/src/main/resources/META-INF/doma/example/dao/EmployeeSummaryDao/bindVariableInFunctionParameters.sql	Added new test block comments for grouped conditions.
src/test/testData/sql/parser/SQLParser.sql	Updated conditional expressions to use explicit parentheses.
src/test/kotlin/org/domaframework/doma/intellij/document/SqlSymbolDocumentTestCase.kt	Refactored field access logic to use the new accessElements extension.
src/main/kotlin/org/domaframework/doma/intellij/extension/expr/SqlElExtensions.kt	Changed expression list retrieval to use getElPrimaryExprList with sorting by text offset.
src/main/java/org/domaframework/doma/intellij/Sql.bnf	Adjusted grammar to include el_paren_expr in el_term_expr and modified associated pin attributes.

Comments suppressed due to low confidence (2)

src/main/java/org/domaframework/doma/intellij/Sql.bnf:139

• Including 'el_paren_expr' in el_term_expr expands the recognized expressions; please verify that this change does not introduce parsing ambiguities or break backward compatibility.

el_term_expr ::= el_comparison_expr_group | el_arithmetic_expr_group | el_factor_expr | el_paren_expr

src/main/java/org/domaframework/doma/intellij/Sql.bnf:174

• The removal of the '{pin=1}' attribute simplifies the rule but may affect error recovery; consider whether reintroducing a pin constraint is necessary to ensure stable parsing behavior.

private el_paren_expr ::= "(" el_expr ")"