test: add SQL token type tests for parenthesis and identifier coverage

Add 3 tests that exercise specific token types in colorizeSql:
- Parentheses (LeftParenthesis/RightParenthesis) → muted coloring (lines 66-69)
- Nested function call tokens → exercises nested token handling
- Identifier tokens → exercises default switch case (line 70-71)

Author: BYK

test/lib/formatters/sql.property.test.ts

@@ -182,3 +182,32 @@ describe("property: colorizeSql", () => {
     );
   });
 });
+
+// ---------------------------------------------------------------------------
+// Additional colorizeSql cases to cover specific token types
+// ---------------------------------------------------------------------------
+
+describe("colorizeSql — parenthesis and default token types", () => {
+  test("handles SQL with parentheses (LeftParenthesis/RightParenthesis tokens)", () => {
+    const sql = "SELECT COUNT(*) FROM users WHERE id IN (1, 2, 3)";
+    const result = colorizeSql(sql);
+    // Parentheses should be muted but still present
+    expect(stripAnsi(result)).toContain("(");
+    expect(stripAnsi(result)).toContain(")");
+  });
+
+  test("handles SQL with function call returning nested tokens", () => {
+    const sql = "SELECT MAX(age), MIN(salary) FROM employees";
+    const result = colorizeSql(sql);
+    expect(stripAnsi(result)).toContain("MAX");
+    expect(stripAnsi(result)).toContain("MIN");
+  });
+
+  test("handles SQL with default token (identifier)", () => {
+    const sql = "SELECT user_name, email FROM user_profile";
+    const result = colorizeSql(sql);
+    // Identifiers use default coloring (no specific case in switch)
+    expect(stripAnsi(result)).toContain("user_name");
+    expect(stripAnsi(result)).toContain("email");
+  });
+});