Reject day of year 366 in a non-leap year instead of rolling over

[Sreekant13]

Pull Request Checklist

Thank you for taking the time to improve Arrow! Before submitting your pull request, please check all appropriate boxes:

• 🧪 Added tests for changed code. (Updated the existing test_YYYY_DDDD assertion; see below.)
• 🛠️ All tests pass when run locally. (The parser test suite passes; I could not run the full tox matrix locally.)
• 🧹 All linting checks pass when run locally. (Change is three source lines plus one test assertion; I did not run tox -e lint locally.)
• 📚 Updated documentation for changed code. (N/A: no user-facing docs change.)
• ⏩ Code is up-to-date with the master branch.

Description of Changes

The DDD/DDDD tokens and parse_iso validate the day of year with datetime.strptime("%Y-%j"), which accepts day 366 in a non-leap year and rolls the result over into January 1 of the following year rather than rejecting it. That is inconsistent with day 367 and above (which are rejected), and surprising because a "day of year" input returns a date in a different year than the one parsed.

For example, arrow.get("2023-366", "YYYY-DDD") currently returns 2024-01-01, while arrow.get("2023-367", ...) and arrow.get("2023-456", ...) are rejected with "The provided day of year N is invalid".

This detects the rollover and raises ParserError, matching the existing out-of-range handling: after strptime, if the resulting year differs from the parsed year, the day of year is out of range for that year. Leap years are unaffected, so arrow.get("2024-366", "YYYY-DDD") still returns 2024-12-31.

Note this is a small behavior change. test_YYYY_DDDD previously asserted parse_iso("2017-366") == datetime(2018, 1, 1) with a comment describing the rollover as expected; that assertion is updated to expect a ParserError. The parser test suite passes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (2224255) to head (0ae2607).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #1329   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           10        10           
  Lines         2315      2317    +2     
  Branches       358       359    +1     
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+ Hits          2315      2317    +2     

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