Refactor2

[khezen]

Changed

• Hippocampus refactored from wrapper to composable component
• Hippocampus no longer inherits from dspy.Module or accepts a module parameter
• Removed forward(), aforward() — agents call their own modules and pass hippo.context_memory
• Added observe(result) / aobserve(result) to feed agent results back for reflection
• Added context_memory read-only property
• Added bind_topics(topics, topic_ids) public method (replaces direct _topic_ids access)
• Added inject_context_memory(module) standalone utility for signature injection
• All 6 review agents updated to composable pattern
• Internal: Flattened hippocampus/modules/ directory structure
  • Moved distiller.py and cartographer.py from hippocampus/modules/ to hippocampus/ package root
  • Removed hippocampus/modules/__init__.py and deleted modules/ subdirectory
  • Updated imports in hippocampus.py and hippocampus/__init__.py to reference new locations
  • No external API changes — imports through hippocampus/__init__.py remain unchanged