Fix #11506: Add freshness config to sources (#11628)

[QMalcolm]

Resolves #11681

Problem

1.9.latest needs to support freshness within source config

Solution

Backport #11628

Checklist

• I have read the contributing guide and understand what's expected of me.
• I have run this code in development, and it appears to resolve the stated issue.
• This PR includes tests, or tests are not required or relevant for this PR.
• This PR has no interface changes (e.g., macros, CLI, logs, JSON artifacts, config files, adapter interface, etc.) or this PR has already received feedback and approval from Product or DX.
• This PR includes type annotations for new and modified functions.

[codecov]

Codecov Report

Attention: Patch coverage is 89.28571% with 3 lines in your changes missing coverage. Please review.

Project coverage is 89.03%. Comparing base (1651bbd) to head (6fcf7d4).
Report is 1 commits behind head on 1.9.latest.

Additional details and impacted files

@@              Coverage Diff               @@
##           1.9.latest   #11683      +/-   ##
==============================================
- Coverage       89.10%   89.03%   -0.07%     
==============================================
  Files             184      184              
  Lines           23911    23928      +17     
==============================================
  Hits            21305    21305              
- Misses           2606     2623      +17     

Flag	Coverage Δ
integration	86.35% <89.28%> (-0.19%)	⬇️
unit	62.16% <78.57%> (+0.01%)	⬆️

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Components	Coverage Δ
Unit Tests	62.16% <78.57%> (+0.01%)	⬆️
Integration Tests	86.35% <89.28%> (-0.19%)	⬇️

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