test: improve warning message assertion for COPILOT_API_KEY

Agent-Logs-Url: https://github.com/github/gh-aw-firewall/sessions/048378d6-92ce-40bd-bf1b-e668cf5ceb38

Author: Copilot

src/cli.test.ts

@@ -1397,6 +1397,9 @@ describe('cli', () => {
       expect(result.enabled).toBe(true);
       expect(result.warnings).toHaveLength(2);
       expect(result.warnings[0]).toContain('no API keys found');
+      expect(result.warnings[1]).toContain('OPENAI_API_KEY');
+      expect(result.warnings[1]).toContain('ANTHROPIC_API_KEY');
+      expect(result.warnings[1]).toContain('COPILOT_GITHUB_TOKEN');
       expect(result.warnings[1]).toContain('COPILOT_API_KEY');
       expect(result.warnings[1]).toContain('GEMINI_API_KEY');
       expect(result.debugMessages).toEqual([]);