Save full forecast, once every 30 minutes

[peterdudfield]

Pull Request

Description

Make sure forecasts are saved. But only save these once every 30 mintues, as we don't want o over load ForecastSQL and ForecastValuesSQL table

How Has This Been Tested?

CI tests

• [x] Yes

Checklist:

• [x] My code follows OCF's coding style guidelines
• [x] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] I have checked my code and corrected any misspellings

[codecov[bot]]

Codecov Report

Merging #4 (f00f3ba) into main (27eecd9) will decrease coverage by 0.33%. Report is 1 commits behind head on main. The diff coverage is 89.65%.

@@            Coverage Diff             @@
##             main       #4      +/-   ##
==========================================
- Coverage   95.94%   95.62%   -0.33%     
==========================================
  Files           4        4              
  Lines         296      320      +24     
==========================================
+ Hits          284      306      +22     
- Misses         12       14       +2     

Files Changed	Coverage Δ
forecast_blend/app.py	93.93% <89.65%> (-1.30%)	:arrow_down:

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