feat(workflow-controller): make log level configurable

[pcandido]

What this PR does / why we need it:

Adds the ability to override the workflow-controller log level and glog verbosity via Helm values. Today --loglevel is hardcoded to debug and --gloglevel to "1" in the Deployment, so operators cannot reduce log volume without forking or post-rendering.

In multi-cluster setups (e.g. 20+ clusters), the litmus-agent-workflow-controller at debug generates a large amount of logs (e.g. 30k+ records per 15 minutes), increasing ingestion and storage cost. This change adds:

• appSettings.loglevel (default: debug, for compatibility) — controls the application log level (debug, info, warn, error). Installers can set e.g. workflow-controller.appSettings.loglevel: "info" to cut debug noise.
• appSettings.gloglevel (default: "1", for compatibility) — controls glog verbosity (numeric; higher = more verbose). Installers can set e.g. workflow-controller.appSettings.gloglevel: "0" to reduce glog output.

Both keep existing behavior by default so the chart remains backward compatible.

Which issue this PR fixes

fixes #474

Special notes for your reviewer:

• Defaults remain loglevel: debug and gloglevel: "1" for backward compatibility.
• Only the workflow-controller subchart was changed; chart version bumped 0.2.2 → 0.2.3 (patch).
• litmus-agent/Chart.yaml dependency on workflow-controller updated to 0.2.3.

Checklist

• DCO signed
• Chart Version bumped
• Variables are documented in the README.md

---

@Vr00mm @ispeakc0de @Jonsy13

[Vr00mm]

Hello, great job.
Its render well on my side.

You don't need to edit the README.md since this one is generated by the CI.

Test 1: Default Values (Backward Compatibility)

Command:

helm template charts/litmus-agent charts/litmus-agent

Expected:

- --loglevel
- debug
- --gloglevel
- "1"

Result:

- --loglevel
- debug
- --gloglevel
- "1"

✅ PASS - Default values render correctly

Test 2: Custom Values (info, "0")

Command:

helm template charts/litmus-agent charts/litmus-agent \
  --set workflow-controller.appSettings.loglevel=info \
  --set workflow-controller.appSettings.gloglevel="0"

Expected:

- --loglevel
- info
- --gloglevel
- "0"

Result:

- --loglevel
- info
- --gloglevel
- "0"

✅ PASS - Custom values override correctly

Test 3: Different Values (error, "2")

Command:

helm template charts/litmus-agent charts/litmus-agent \
  --set workflow-controller.appSettings.loglevel=error \
  --set workflow-controller.appSettings.gloglevel="2"

Expected:

- --loglevel
- error
- --gloglevel
- "2"

Result:

- --loglevel
- error
- --gloglevel
- "2"

✅ PASS - Different values work correctly

Summary

All helm template tests pass successfully:

• ✅ Default values maintain backward compatibility (debug, "1")
• ✅ Custom values can be overridden via Helm --set
• ✅ Multiple different values work as expected
• ✅ Chart renders without errors

The PR changes are working as expected!

[pcandido]

Thanks for the tip @Vr00mm. The CI actually asked me to run helm-docs locally from the litmus-agent root, so I had to add an extra commit.