Jul 11

1. 18:38

   refactor(builder): flatten IR into relational tables (RawIr/CanonicalKey), rewrite partition.rs to match, add contextual TimelineError

   karanjahpn
   76f90e3
2. 18:24

   Refactor builder IR: split timeline/reduced modules, encapsulate reduction, drop access-list tracking pending lifecycle.rs decision

   karanjahpn
   e7a10c1
3. 18:04

   Implement lossless builder IR: timelines, reducible-timeline trait, partition frontend

   karanjahpn
   e80c4f8