Improve test coverage to 99.64%

Added comprehensive test cases to achieve near-perfect test coverage:

## Coverage Improvements
- **Statements**: 99.65% (from 76.2%)
- **Branches**: 81.06% (from 55.02%)
- **Functions**: 100% (from 78.57%)
- **Lines**: 99.64% (from 76.97%)

## New Test Files
- `test/summary.test.js`: Complete test suite for summary generation
- `test/index-main.test.js`: Test for main module execution

## Enhanced Test Cases
- Added tests for large output truncation
- Added tests for OSV details with CVE aliases
- Added tests for vulnerabilities without OSV IDs
- Added tests for fixed version recommendations
- Added tests for module call sites and suggested edits
- Added tests for multi-line JSON parsing
- Added tests for error handling edge cases

The only remaining uncovered line is the main module execution check,
which is inherently difficult to test in a unit testing environment.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

test/parser.test.js

@@ -44,6 +44,89 @@ Another invalid line`;
       const vulnerabilities = parser.parse(output);
       expect(vulnerabilities).toHaveLength(1);
     });
+
+    it('should parse multi-line JSON objects', () => {
+      const output = `{
+  "finding": {
+    "osv": "GO-2023-1234",
+    "trace": [{"module": "example.com/vulnerable"}]
+  }
+}
+{
+  "finding": {
+    "osv": "GO-2023-5678",
+    "trace": [{"module": "another.com/package"}]
+  }
+}`;
+      
+      const vulnerabilities = parser.parse(output);
+      expect(vulnerabilities).toHaveLength(2);
+      expect(vulnerabilities[0].finding.osv).toBe('GO-2023-1234');
+      expect(vulnerabilities[1].finding.osv).toBe('GO-2023-5678');
+    });
+
+    it('should store and attach OSV details to vulnerabilities', () => {
+      const output = `
+        {"osv":{"id":"GO-2023-1234","summary":"Critical vulnerability","aliases":["CVE-2023-1234"]}}
+        {"finding":{"osv":"GO-2023-1234","trace":[{"module":"example.com/vulnerable"}]}}
+        {"osv":{"id":"GO-2023-5678","summary":"Another vulnerability"}}
+        {"finding":{"osv":"GO-2023-5678","trace":[{"module":"another.com/package"}]}}
+      `;
+      
+      const vulnerabilities = parser.parse(output);
+      
+      expect(vulnerabilities).toHaveLength(2);
+      expect(vulnerabilities[0].osvDetails).toEqual({
+        id: 'GO-2023-1234',
+        summary: 'Critical vulnerability',
+        aliases: ['CVE-2023-1234']
+      });
+      expect(vulnerabilities[1].osvDetails).toEqual({
+        id: 'GO-2023-5678',
+        summary: 'Another vulnerability'
+      });
+    });
+
+    it('should handle invalid JSON in multi-line format', () => {
+      const output = `{
+  "finding": {
+    "osv": "GO-2023-1234",
+    "trace": [{"module": "example.com/vulnerable"}]
+  }
+}
+{ invalid json
+{
+  "finding": {
+    "osv": "GO-2023-5678",
+    "trace": [{"module": "another.com/package"}]
+  }
+}`;
+      
+      const vulnerabilities = parser.parse(output);
+      expect(vulnerabilities).toHaveLength(2);
+    });
+
+    it('should parse OSV details in multi-line format', () => {
+      const output = `{
+  "osv": {
+    "id": "GO-2023-1234",
+    "summary": "Critical vulnerability"
+  }
+}
+{
+  "finding": {
+    "osv": "GO-2023-1234",
+    "trace": [{"module": "example.com/vulnerable"}]
+  }
+}`;
+      
+      const vulnerabilities = parser.parse(output);
+      expect(vulnerabilities).toHaveLength(1);
+      expect(vulnerabilities[0].osvDetails).toEqual({
+        id: 'GO-2023-1234',
+        summary: 'Critical vulnerability'
+      });
+    });
   });
 
   describe('extractUniqueModules', () => {