[docs-patrol] Document dynamic Kafka topic templates for OTel runtime outputs

Recent code changes in the repository have introduced documentation drift. The following change needs corresponding documentation updates.

Changes Requiring Documentation Updates

1. Dynamic Kafka topic templates are now supported in OTel output translation

Commit(s):

• 94f75d926037d5e81828774905a5f11e9a40ff88 ([beatreceiver] Add support for dynamic kafka topic in OTel)

What changed:

• internal/pkg/otel/translate/output_kafka.go now supports non-constant Kafka topic expressions (for example %{[data_stream.type]} patterns) by:
  • compiling topic templates,
  • setting topic_from_attribute, and
  • generating a transform processor to populate the topic attribute.
• The same commit also updates translation wiring in internal/pkg/otel/translate/otelconfig.go so exporter-provided processor config is added to the pipeline.

Documentation impact:

• User-facing docs do not currently describe this new Kafka topic-template behavior for OTel runtime output translation.
• Repository docs search found no references for the new behavior (topic_from_attribute, %{[...]} topic templates, or dynamic topic support) under docs/.
• docs/hybrid-agent-beats-receivers.md documents runtime selection and translation concepts, but does not explain this new Kafka dynamic-topic behavior.

Suggested Actions

• Update docs/hybrid-agent-beats-receivers.md to document dynamic Kafka topic template support when using OTel runtime translation.
• Add a concrete configuration example showing %{[...]} topic templates and explain resulting behavior (topic_from_attribute + transform processor).
• Add/adjust related reference/release-note docs so users discover this capability when configuring Kafka outputs.

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What is this? | From workflow: Docs Patrol

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• expires on Apr 9, 2026, 2:45 PM UTC

Start with docs/hybrid-agent-beats-receivers.md and compare its runtime translation guidance with internal/pkg/otel/translate/output_kafka.go and internal/pkg/otel/translate/otelconfig.go. Add a concrete %{[...] } Kafka topic-template example and explain topic_from_attribute and the generated transform processor. Done means users can discover and understand the dynamic-topic behavior in the relevant documentation.