Add some comments about failures when saving state
Add some comments about failures when saving state

It is important to remember that these could be Stratis errors, not
just IO errors.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

mulkieran/stratisd,stratis-storage/stratisd,stratis-storage/stratisd,trgill/stratisd,trgill/stratisd,mulkieran/stratisd,stratis-storage/stratisd