Improve recorder util resolve_period

[emontnemery]

Proposed change

Improve recorder util resolve_period:

• Positive offsets now work correctly
• Monthly offsets longer than 48 months now work correctly

This is a follow up to #132167

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[home-assistant]

Hey there @home-assistant/core, mind taking a look at this pull request as it has been labeled with an integration (recorder) you are listed as a code owner for? Thanks!

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[peteh]

Looks good and should not be prone to overflow anymore.

Maybe a few more dates could be checked that might be edge cases.