M1: Ensure deterministic output ordering and normalization

[jeffpatton1971]

Add explicit ordering rules and normalization so the same input yields byte-for-byte stable output.

Definition of done

• Sort commands and parameters deterministically.
• Normalize line endings to \n or platform-consistent rules.
• Avoid timestamps, machine names, absolute paths in generated XML.

Acceptance checks

• Unit test runs generation twice and asserts same output string.

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8) Unit tests for model + renderer + validator

Title: M1: Unit tests for canonical model, MAML renderer, and schema validator
Type: Tests
Labels: adr:001, milestone:m1, area:tests, type:test

Description
Add unit tests that lock the behavior for the Core layer.

Definition of done

• Tests cover:

  • Model creation
  • Renderer output contains key nodes
  • Validator success/failure
  • Determinism