[comp log_backend] Component FMEA creation

## What

Create the Component FMEA (`wp__sw_component_fmea`) for the component log_backend. The FMEA verifies the component architecture as part of the SW Safety Concept, linking detections, preventions, and mitigations to Component Requirements or Assumptions of Use.

## How

**Process step:** [wf__analyse_comparch](https://eclipse-score.github.io/process_description/main/process_areas/safety_analysis/safety_analysis_workflow.html#wf__analyse_comparch)

## Definition of Done

All criteria of the [Safety Analysis Checklist](https://eclipse-score.github.io/process_description/main/process_areas/safety_analysis/guidance/safety_analysis_checklist.html) are met.

## Template & Folder Structure

- **Template:** [Component FMEA Template](https://eclipse-score.github.io/module_template/main/score/component_example/docs/safety_analysis/fmea.html)
- **Folder:** `score//docs/safety_analysis/` – see [Module Folder Structure](https://eclipse-score.github.io/module_template/main/index.html#module-layout)

*Please apply the linked template and folder structure to ensure consistency across the S-CORE project.*

Start with the linked analyse_comparch process step, Safety Analysis Checklist, and Component FMEA Template. Create the artifact under score/log_backend/docs/safety_analysis/ using the linked module folder structure, and confirm that every checklist criterion is met, including links between detections, preventions, mitigations, and Component Requirements or Assumptions of Use.

Written by the indexing model from the issue text.