reduce rename-split test-data to minimal possible size

[Copilot]

Describe your changes

Restored previously deleted test fixtures while minimizing atmos_daily and ocean_annual test files:

Test Data Restored (23 CDL files):

• river_month, ocean_annual, ocean_static (native/regrid, input/output)
• fail_filenames and fail_nofiles test cases

Test Configuration Updated:

• Restored 10-case parametrization (from 2): daily, monthly, annual, static frequencies × native/regrid + 2 failure cases
• Updated tile file assertion: 8 files (was 4)

Minimized Test Files:

• atmos_daily: 358 lines, 9.1KB (94% reduction from original 5,816 lines, 290KB)
  • Grid: 2×2 (was 15×10), vertical levels: 2 (was 66), timesteps: 181 (unchanged)
• ocean_annual: 97 lines, 2.4KB (97% reduction from original 2,835 lines, 159KB)
  • Grid: 2×2 (was 15×10), vertical levels: 2 (was 75), time: 1 timestep (unchanged)

Other Test Files: Remain at original size (river_month: 232 lines, ocean_static: 104 lines)

Test Results: 15 total (13 passed, 2 xfail)

Overall Impact: Total test directory size reduced from 1.1M to 444K (60% reduction)

Issue ticket number and link (if applicable)

N/A

Checklist before requesting a review

• I ran my code
• I tried to make my code readable
• I tried to comment my code
• I wrote a new test, if applicable
• I wrote new instructions/documentation, if applicable
• I ran pytest and inspected it's output
• I ran pylint and attempted to implement some of it's feedback
• No print statements; all user-facing info uses logging module

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.94%. Comparing base (4ae680b) to head (87c5f3a).

Additional details and impacted files

@@              Coverage Diff              @@
##           rename-split     #719   +/-   ##
=============================================
  Coverage         82.94%   82.94%           
=============================================
  Files                69       69           
  Lines              4655     4655           
=============================================
  Hits               3861     3861           
  Misses              794      794           

Flag	Coverage Δ
unittests	82.94% <ø> (ø)

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[ilaflott]

@copilot

• this is what we want
• now do the ocean_annual cases
• leave all other cases alone at this point. only reduce the ocean_annual cases.

[Copilot]

@copilot

• this is what we want
• now do the ocean_annual cases
  ...

Completed in commit b3300ce. ocean_annual test files reduced from 2835 lines to 97 lines (97% reduction):

• Grid: 15×10 → 2×2
• Vertical levels: 75 → 2
• Directory size: 1.1M → 444K (60% total reduction)

All other test cases remain unchanged. All 15 tests pass.

[ilaflott]

annoying but because i removed the one-off workflow trigger, it un-associated the workflow from this PR. the proof-in-pudding workflow is linked here

[ilaflott]

codecov reports exact same coverage % vs https://app.codecov.io/gh/NOAA-GFDL/fre-cli/blob/rename-split/fre%2Fpp%2Frename_split_script.py

[ceblanton]

yes!!! and thank you