Fix clippy & unit test failures

[ianstanton]

Example failure: https://github.com/tembo-io/tembo/actions/runs/11376253782/job/31648418163

error: linker `cc` not found
  |
  = note: No such file or directory (os error 2)

error: could not compile `proc-macro2` (build script) due to 1 previous error
warning: build failed, waiting for other jobs to finish...
error: could not compile `libc` (build script) due to 1 previous error
Error: Process completed with exit code 101.