Brings in the fragmented file data stabilization across snapshots and
GC (penpot#12410) and the per-library pointer loader fix. Four files
conflicted.
file_gc.clj `process-file!` keeps the branch's `:is-branch` skip and
its warning; ordinary files run the new body under `with-pointers`
(snapshot liveness, reattach of unchanged fragments, fragment
cleaning).
files_snapshot.clj `restore-file-snapshot` takes the new backup
transaction, which reads the file FOR SHARE and gives the guard revn.
`fsnap/check-restorable!` now runs on that read, before the backup
snapshot is created, so a branch file is still refused without a
committed backup.
binfile_test.clj and rpc_file_snapshot_test.clj keep the tests both
sides appended.
AI-assisted-by: claude-opus-5-5
Signed-off-by: Álvaro Tejero Cantero <alvorithm@teje.ro>
607920fad3