[slopgobblercobbler]

Closes #7.

Summary of Changes

• Documented in \README.md\ that \strip_server_headers=True\ operates at the ASGI middleware layer and cannot strip the \Server\ header appended downstream by Uvicorn.
• Documented instructions for properly disabling Uvicorn's wire-level header via programmatic configuration (\server_header=False) and CLI flag (--no-server-header).
• Positioned the documentation cleanly within the \Custom Configuration\ section.
• Added comprehensive unit tests in \ ests/test_middleware.py\ verifying \strip_server_headers\ when enabled, disabled by default, and configured via \SecurityHeadersConfig.

Verification

• 23/23 pytest tests passing.