Support repeated reads of cached timestamps

[daniel-thom]

Fixes #345

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 80.03%. Comparing base (7f9ce2a) to head (e1d17f8).

Additional details and impacted files

[](https://app.codecov.io/gh/NREL-Sienna/InfrastructureSystems.jl/pull/346?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NREL-Sienna) ```diff @@ Coverage Diff @@ ## main #346 +/- ## ========================================== - Coverage 80.21% 80.03% -0.19% ========================================== Files 54 54 Lines 4398 4412 +14 ========================================== + Hits 3528 3531 +3 - Misses 870 881 +11 ``` | [Flag](https://app.codecov.io/gh/NREL-Sienna/InfrastructureSystems.jl/pull/346/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NREL-Sienna) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/NREL-Sienna/InfrastructureSystems.jl/pull/346/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NREL-Sienna) | `80.03% <100.00%> (-0.19%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NREL-Sienna#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/NREL-Sienna/InfrastructureSystems.jl/pull/346?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NREL-Sienna) | Coverage Δ | | |---|---|---| | [src/time\_series\_cache.jl](https://app.codecov.io/gh/NREL-Sienna/InfrastructureSystems.jl/pull/346?src=pr&el=tree&filepath=src%2Ftime_series_cache.jl&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NREL-Sienna#diff-c3JjL3RpbWVfc2VyaWVzX2NhY2hlLmps) | `94.44% <100.00%> (+1.87%)` | :arrow_up: | ... and [6 files with indirect coverage changes](https://app.codecov.io/gh/NREL-Sienna/InfrastructureSystems.jl/pull/346/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NREL-Sienna)

[jd-lara]

@daniel-thom looks good to me. Merge whenever