Detects whether the four required Memory OS SOUL.md sections are present:
- Ground Truth Hierarchy (layer 7)
- Context Injection Convention
- Fact Feedback Rule
- Honcho Deprecation Notice
Case-insensitive keyword matching. Exits 0 if all pass, 1 otherwise.
Without these sections, injected memory is treated as external sources
to cite rather than prior knowledge — causing the 'internal mechanics leak'
behavior reported in #19.
ClaudioDrews