feat: Proposed SIMBAUQ Sampling Strategy

[radum2275]

Sampling Strategy PR

Use this template when adding or modifying sampling strategies in mellea/stdlib/sampling/.

Description

• Link to Issue: Fixes Proposal: Integrating Similarity‑Based Aggregation for Uncertainty Quantification into Mellea #718

Implementation Checklist

Base Class

• Extends appropriate base class:
  • BaseSamplingStrategy if your changes are mostly modifying the repair and/or select_from_failure functions
  • SamplingStrategy if your changes involve a new sample method
  • Other defined sampling strategies if your implementation is similar to existing implementations

Return Value

• Returns a properly typed SamplingResult. Specifically, this means:
  • ModelOutputThunks in sample_generations are properly typed from the Component and the parsed_repr is the expected type.

Integration

• Strategy exported in mellea/stdlib/sampling/__init__.py

Testing

• Tests added to tests/sampling/
• New code has 100% coverage
• Ensure existing tests and github automation passes (a maintainer will kick off the github automation when the rest of the PR is populated)

[github-actions]

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