Snapshots defeated the entire purpose of compaction - if we're keeping
the original content, we're not actually saving any space. Compaction
is about graceful memory decay for agentic databases, not reversible
compression.
Removed:
- CreateSnapshot/GetSnapshots/RestoreFromSnapshot from storage
- --restore flag and functionality from bd compact command
- All snapshot-related tests
- Snapshot struct and related code
The database is ephemeral and meant to decay over time. Compaction
actually reduces database size now.
Closes bd-260 (won't fix - conceptually wrong)
Closes bd-261 (already done in bd-259)
da5493bac0