fix: enhance regex for method signature matching

Author: NaccOll

src/services/tree-sitter/__tests__/fixtures/sample-java.ts

@@ -93,7 +93,7 @@ public class TestClassDefinition<T extends Comparable<T>>
         value="test"
     )
     
-    public void testMultipleAnnotationMethod(String message, T data) {
+    void testMultipleAnnotationMethod(String message, T data) {
         System.out.println(testInterfaceDefaultMethod(message, data));
     }
 

src/services/tree-sitter/__tests__/parseSourceCodeDefinitions.java.spec.ts

@@ -91,9 +91,7 @@ describe("parseSourceCodeDefinitionsForFile with Java", () => {
 	it("should parse method declarations", () => {
 		expect(parseResult).toMatch(/\d+--\d+ \|\s*void testInterfaceMethod\(/)
 		expect(parseResult).toMatch(/\d+--\d+ \|\s*public void testInterfaceMethod\(String message, T data\) {/)
-		expect(parseResult).toMatch(
-			/\d+--\d+ \|\s*public void testMultipleAnnotationMethod\(String message, T data\) {/,
-		)
+		expect(parseResult).toMatch(/\d+--\d+ \|\s*void testMultipleAnnotationMethod\(String message, T data\) {/)
 		expect(parseResult).toMatch(/\d+--\d+ \|\s*default String testInterfaceDefaultMethod\(/)
 		expect(parseResult).toMatch(/\d+--\d+ \|\s*public <R extends Comparable<R>> R testGenericMethodDefinition\(/)
 		expect(parseResult).toMatch(/\d+--\d+ \|\s*public String formatMessage\(/)

src/services/tree-sitter/index.ts

@@ -449,8 +449,9 @@ function findJavaMethodSignatureLine(lines: string[], startLine: number, endLine
 	// - Followed by return type
 	// - Followed by method name
 	// - Followed by parentheses
+	// Using atomic groups and possessive quantifiers to prevent backtracking
 	const methodSignaturePattern =
-		/^\s*(public|private|protected|static|final|abstract|synchronized|native|strictfp|\w+\s+)*\w+\s*\(/
+		/^\s*(?:public|private|protected|static|final|abstract|synchronized|native|strictfp|\w+)(?:\s+(?:public|private|protected|static|final|abstract|synchronized|native|strictfp|\w+))*\s+\w+\s*\(/
 
 	for (let i = startLine; i <= endLine; i++) {
 		const line = lines[i].trim()