Use explicit source and destination fork snapshots, share committed-write materialization across Memory and JSONL, and remove unused list snapshot plumbing.
* refactor: search out of repo
* fix: apply cases, no resolve for index on every hit
* chore: tests
* fix: use iterator and no open
* refactor: public dir stuff in jsonl, source
* cleanup and sqlite time number
* fix: use storage for label search too, delete types
* refactor: abstract some more
* docs: example jsonl with elastic search
* docs: Christian's md
* refactor: simpler api surface
* feat: rebuild
* docs: consolidate
* fix: use trigger for sqlite, cleanup indexable, add example in doc
* chore: restore upstream responses shared
* fix: delete metadata from jsonl search hit
* fix: AsynIterable
* refactor: scanning for memory, reuse
* fix: dont export jsonlSessionDirectoryName
* cleanup: more shared stuff
* cleanup: why, jsonl?
* fix: findEntriesOnBranch filters
* fix: branch entry membership index
* fix: get log limit, add test
* fix: record indexes
* fix: use facts index
* fix: composite desc index for cwd, created at
* 1. rejects corrupt parent chains in array-backed readers
* 2. does not decode SQLite branch entries outside query bounds
* 3. validates SQLite entries before filtering and limiting branch results
* 4. does not validate SQLite ancestors beyond newest-first stop bounds
* 5. rejects repository operations and session writes after disposal
* 6. supports lexical ownership with await using
* 7. uses listing as a barrier between accepted session operations
* 8. waits for every accepted session operation during disposal
* 9. waits for accepted appends before disposal and rejects later writes
* 10. repository disposal closes its owned storage
* 11. stops branch traversal at retained-tail compaction
* docs: mark QA2 done
