[O2B-1415] Fix ENABLE_HOUSEKEEPING environment variable parsing

[martinboulais]

I have a JIRA ticket

• branch and/or PR name(s) include(s) JIRA ID
• issue has "Fix version" assigned
• issue "Status" is set to "In review"
• PR labels are selected

Notable changes for users:

• N/A

Notable changes for developers:

• Environment variable ENABLE_HOUSEKEEPING must be set to true (case-insensitive) to actually enable housekeeping

Changes made to the database:

• N/A

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.78%. Comparing base (ae0db5f) to head (28e2815).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1813      +/-   ##
==========================================
- Coverage   43.79%   43.78%   -0.01%     
==========================================
  Files         893      893              
  Lines       15951    15950       -1     
  Branches     3002     3001       -1     
==========================================
- Hits         6985     6984       -1     
  Misses       8966     8966              

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