fix(taskfile): aws auth check incorrectly returns non-zero

[rochecompaan]

What changed

In Taskfile.yml, replaced:

[ "$EXPIRES_EPOCH" -le "$CURRENT_TIME" ] && NEED_LOGIN=true

with:

if [ "$EXPIRES_EPOCH" -le "$CURRENT_TIME" ]; then
  NEED_LOGIN=true
fi

Why

[ ... ] is a command (test) and returns:

• 0 when true
• 1 when false

In the old A && B form, a false comparison returns 1, so the whole line returns non-zero.
Because go-task runs commands in fail-fast mode, that non-zero status caused establish-aws-login to abort, even on normal “not
expired yet” paths.

Result

The expiration check now uses explicit control flow (if), so a false condition is treated as expected logic, not a task failure.
This prevents spurious non-zero exits both locally and in GitHub Actions.