Log Editing

Log editing currently uses PackageSession.

Characteristics

• in-memory edits against LasFile
• dirty-state tracking
• metadata edits and curve edits
• explicit save and save_as
• revision-aware persistence

Save behavior

• accepted edits mutate the session state in memory
• save writes a new canonical revision snapshot
• the visible package root is rematerialized from that new head
• the session stays bound to the same package unless save_as rebases it