fix: make tests version-agnostic to prevent future breakage

- Remove hardcoded version checks in test_server.py
- Update test_config.py to check version format instead of specific value
- Tests now validate structure/format rather than exact versions
- Prevents test failures when bumping versions

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

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

tests/test_server.py

@@ -92,6 +92,6 @@ class TestServerTools:
         assert len(result) == 1
 
         response = result[0].text
-        assert "Gemini MCP Server v2.4.1" in response
+        assert "Gemini MCP Server v" in response  # Version agnostic check
         assert "Available Tools:" in response
         assert "think_deeper" in response