Add two regression tests that fail on v1.76.0 and pass with the fix:
- wire-level test: a Headers instance (the shape @immich/sdk hands over)
must reach the remote server with all headers intact
- real-SDK e2e: getServerStatistics through fetchWithTrustedCertificatesAsync
against a live local server must deliver x-api-key
The v1.76.0 User-Agent injection object-spread `fetchOptions.headers`, which
silently drops all headers when the value is a Headers instance. The Immich
SDK passes a Headers object with the merged x-api-key header, so requests
lost their API key and returned 401 (issue #6672). Build a real Headers
instance instead, keeping case-insensitive user-agent handling.
Thomas
Meier Lukas