Tests
- add ef tests scaffolding (b26f8a0)
- update makefile with ef-tests command and vars (4428777)
- update nextest.toml to allow longer timeouts (2ea40fc)
- update nextest.toml to allow longer timeouts and full cpu (266dc59)
Miscellaneous
- release: bump version to 1.5.5-rc.5 (b276f94)