[fix][backend]auto_task:fix ttl

[zero3233-bd]

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[CozeLoop]

No risk introduced by this change.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main     #310      +/-   ##
==========================================
- Coverage   68.47%   68.47%   -0.01%     
==========================================
  Files         569      569              
  Lines       51739    51739              
==========================================
- Hits        35430    35428       -2     
- Misses      13563    13564       +1     
- Partials     2746     2747       +1     

Flag	Coverage Δ
unittests	68.47% <100.00%> (-0.01%)	⬇️

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Files with missing lines	Coverage Δ
...d/modules/observability/domain/task/entity/task.go	55.55% <100.00%> (ø)

... and 1 file with indirect coverage changes

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