Summary

The architect design for ACON compression guidelines (section 8.1) specifies a --compression-guidelines CLI flag for runtime override of [memory.compression_guidelines].enabled. This was deferred during implementation.

Every config-toggleable feature should have a CLI override for consistency with the existing pattern (e.g. --graph-memory, --tui, --debug-dump).

Fix

Add --compression-guidelines flag to src/main.rs that overrides config.memory.compression_guidelines.enabled = true at startup.

Identified by code reviewer (REVIEW-7) during ACON compression guidelines PR (#1647) review.