[CONS-8186] Implement DD_SLO_FORCE_SYNC_PERIOD for DatadogSLO

[mrdoggopat]

What does this PR do?

This PR adds an option for users to configure the DatadogSLO force sync period. This option is available for DatadogMonitor and DatadogDashboard so it would be nice to have this for DatadogSLO.

Motivation

CONS-8186. Mainly to control the re-sync period to avoid potential rate limit issues.

Describe your test plan

1. Enable the SLO controller and run operator in debug logging level
2. Add the env var set to "2"
3. Apply an example SLO from examples/datadogslo/
4. Get the lastForceSynctime k get datadogslo <datadog slo name> -o yaml | yq .status.lastForceSyncTime ensure it's less than 2mins old
5. Review logs to ensure the debug one is picked up:
   {"level":"DEBUG","ts":"2026-03-24T14:31:51.776Z","logger":"controllers.DatadogSLO","msg":"Setting SLO force sync period","datadogslo":{"name":"example-slo-monitor3","namespace":"default"},"minutes":2}
6. Make a change in the SLO in the UI and ensure it's reverted less than 2mins after
7. Remove the env var, restart the operator and wait for 2 mins (after lease happened) and ensure lastForceSyncTime is not updated (because it's been less than 60 mins default since the last update)

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label
• All commits are signed (see: signing commits)

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 11.11111% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.92%. Comparing base (ae90bec) to head (25b386c).
⚠️ Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/controller/datadogslo/controller.go	11.11%	6 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2811      +/-   ##
==========================================
+ Coverage   38.77%   38.92%   +0.14%     
==========================================
  Files         311      311              
  Lines       27029    27200     +171     
==========================================
+ Hits        10481    10588     +107     
- Misses      15766    15822      +56     
- Partials      782      790       +8     

Flag	Coverage Δ
unittests	38.92% <11.11%> (+0.14%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
internal/controller/datadogslo/controller.go	59.88% <11.11%> (-2.32%)	⬇️

... and 4 files with indirect coverage changes

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[mrdoggopat]

/merge

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2026-03-30 16:37:33 UTC ℹ️ Start processing command /merge

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2026-03-30 16:37:38 UTC ❌ MergeQueue

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