add area available data calculation in generate statistical model task

[danangmassandy]

This is for #2070.

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[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
17061	16559	97%	0%	🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: 021a054 by action🐍

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 98.80952% with 1 line in your changes missing coverage. Please review.

Project coverage is 97.26%. Comparing base (073b971) to head (021a054).

Files	Patch %	Lines
django_project/frontend/api_views/statistical.py	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2089 +/- ## ========================================== - Coverage 97.26% 97.26% -0.01% ========================================== Files 375 375 Lines 16833 16863 +30 ========================================== + Hits 16372 16401 +29 - Misses 461 462 +1 ```

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[lgkgh]

Jenkins Build Details:

Build status: SUCCESS Build duration: 19 min

[lgkgh]

Jenkins Build Details:

Build status: SUCCESS Build duration: 21 min

[lgkgh]

Jenkins Build Details:

Build status: SUCCESS Build duration: 2 min 34 sec