feat(observability): add configurable insecure connection for OpenTelemetry

[faranjit]

Adds the ability to toggle insecure connections to the OpenTelemetry collector endpoint via configuration.

• Adds OTELInsecure to the application configuration (env: OTEL_INSECURE).
• Updates InitTracer to configure gRPC dial options based on the insecure flag.
• Updates Helm chart values.yaml and configmap to support otelInsecure (defaulting to false).
• Updates controller and worker initializations to pass the new flag.

[codecov]

Codecov Report

❌ Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.74%. Comparing base (65318b2) to head (ed44cd2).

Files with missing lines	Patch %	Lines
cmd/controller/main.go	0.00%	1 Missing ⚠️
cmd/worker/main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #8      +/-   ##
==========================================
+ Coverage   68.66%   68.74%   +0.07%     
==========================================
  Files          39       39              
  Lines        2582     2588       +6     
==========================================
+ Hits         1773     1779       +6     
  Misses        691      691              
  Partials      118      118              

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