Resolves#419 where URLs with trailing slashes like `/v0/servers/` would
return empty responses instead of proper data.
**Changes**:
- Added TrailingSlashMiddleware that redirects trailing slash URLs with
301 status
- Preserves root path ('/') without redirecting
- Uses HTTP 301 Moved Permanently to indicate canonical form
- Added comprehensive test coverage for the middleware
This follows REST API best practices and is consistent with how major Go
web frameworks handle trailing slash normalization.
Generated with [Claude Code](https://claude.ai/code)
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Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>
Co-authored-by: adam jones <domdomegg@users.noreply.github.com>
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