[ANAMASGARD]

Summary

• What: Compare complete (year, day) dates in carbon processing, nitrogen processing, and event output using a shared helper.
• Motivation: A missed event from a previous year could silently block later events while SIPNET returned success. It now triggers the existing missing-climate error immediately, with exit code 5.

Valid event schedules and output formats remain unchanged. New tests are in tests/sipnet/test_events_infrastructure, as requested.

How was this change tested?

• Confirmed the new regression fails before the fix and passes afterward.
• Tested overdue events across years, same-year misses, future events, valid rollover schedules, repeated climate dates, and empty queues, including nitrogen processing.
• Verified the CLI reproducer exits 5; removing the missed event allows the later tillage to run with exit 0.
• Clean build, make test (29 unit executables passed), and make testrun passed.
• Smoke tests: four executed passes and one existing forced pass. No output fixtures changed.
• LLVM 19 clang-format, clang-tidy, and git diff --check passed.

Reproduction steps

Run the reproducer in #421, which uses:

• Climate dates: 2016/100, then 2017/10.
• Tillage events: 2016/200, then 2017/10.

Before: Exit 0, with neither event written to events.out.

After: Exit 5, reporting that event 2016/200 has no matching climate record when climate reaches 2017/10.

Related issues

• Fixes Missed event across a year boundary silently blocks later events #421.
• Follow-up to Event ordering checks compare DOY to first event regardless of year #74 / SIP74 Fixes event file order check issues #77, addressing runtime date comparisons.
• Prerequisite [#411] Make carbon and nitrogen balance failures fatal #414 has been merged.

Checklist

• Related approved issue is listed above and assigned by a maintainer.
• PR title includes the issue number.
• Regression tests added.
• Documentation updated (not applicable; existing documentation already specifies this behavior).
• docs/CHANGELOG.md updated.
• Code formatted with clang-format.

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[Alomir]

@ANAMASGARD Please resolve the branch conflicts for this PR, and bring it back to ready-for review. Thanks!

[ANAMASGARD]

@Alomir can you please re review it i have resolved the conflict . Thanks