* Tests, WebHost: move out setUp and fix typing in api_generate
Also fixes a typo
and changes client to be per-test rather than a ClassVar
* Tests, WebHost: add tests for display_log endpoint
* Tests, WebHost: add tests for host_room endpoint
* Tests, WebHost: enable Flask DEBUG mode for tests
This provides the actual error if a test raised an exception on the server.
* Tests, WebHost: use user_path for logs
This is what custom_server does now.
* Tests, WebHost: avoid triggering security scans
* Core: lazy-load worlds in unpickler
this should hopefully fix customserver's memory consumption
* WebHost: move imports around to save memory in MP
* MultiServer: prefer loading _speedups without pyximport
This saves ~15MB per MP and speeds up module import if it was built in-place.
* Tests: fix tests for changed WebHost imports
* CustomServer: run GC after setup
* CustomServer: cleanup exception handling