chore: bump go.mod min go version to 1.25

[dougm]

No description provided.

[tenthirtyam]

@dougm - looks like the CI failed

[dougm]

Yeah CI fails here:

not ok 252 vcsim examples
# (from function `flunk' in file ./test_helper.bash, line 209,
#  from function `assert_success' in file ./test_helper.bash, line 214,
#  in test file ./vcsim.bats, line 44)
#   `assert_success' failed
# command failed with exit status 1: go: ../go.mod requires go >= 1.25.0 (running go 1.24.13; GOTOOLCHAIN=local)

I'll try to figure that out later today. In the meantime, I'm pushing a change to remove 'Debug on failure', which always fails and just creates noise (I don't know if it was ever useful).

[tenthirtyam]

Lemme know if you need an extra hand and I'm happy to help if needed.