task: storage-serde-dedup
created: 2026-02-01
completed: 2026-02-01
phase: COMPLETE
before_count: 12
current_count: 0
summary: |
  Created centralized serde_helpers.rs module in stemedb-storage.
  Replaced 12 duplicate serialize_X/deserialize_X functions across 6 files.
  Added enforcement rule to stemedb-core skill.
  Updated ai-lookup/services/storage.md documentation.
  All 225+ workspace tests pass, clippy clean.