Docs: Verify MuscleGroup constructor signature

[kluth]

Problem

MuscleGroup constructor usage in examples needs verification against actual implementation.

Affected Files

Documentation: /home/matthias/projects/synapse/docs/systems/SYSTEMS_OVERVIEW.md (lines 160-165)
Source Code: /home/matthias/projects/synapse/src/muscular/core/MuscleGroup.ts

Issue Details

Severity: MEDIUM
Impact: Code example may not compile/run

Example Requiring Verification

const pipeline = new MuscleGroup('csv-pipeline', [
  parseCSV,
  new FilterMuscle(validateRow),
  new MapMuscle(transformRow),
]);

const users = await pipeline.execute(csvData);

Verification Tasks

1. Check MuscleGroup constructor signature
2. Verify parameter order and types
3. Confirm FilterMuscle and MapMuscle constructor usage
4. Verify execute() method signature
5. Update documentation if discrepancies found

Priority

MEDIUM - Code verification needed

References

• Documentation Issue Log: /home/matthias/projects/synapse/DOCUMENTATION_ISSUE_LOG.md (Issue chore(deps-dev): Bump eslint from 8.57.1 to 9.39.1 #8)
• Documentation Fixes Needed: /home/matthias/projects/synapse/DOCUMENTATION_FIXES_NEEDED.md (FIX-5)

User Story

As a developer, I want correct MuscleGroup usage examples, so that I can build data processing pipelines without trial-and-error.

Acceptance Criteria

• Verify MuscleGroup constructor parameters
• Verify Muscle instantiation patterns
• Update example if needed
• Test that example code works