Add crates/e2e_test/src/chaos.rs with in-process fault-injection
primitives for a single-node multi-disk RustFS server: take a disk
offline (rename to <dir>.offline), bring it back online, replace a
disk with a fresh empty directory, corrupt an object's erasure shard
(part.* byte flips, xl.meta untouched), and SIGKILL/restart the server
with the same volumes and port.
Add reliability tests on a 4-disk (EC 2+2) topology, verified via
sha256 manifests recorded at write time:
- degraded read/write with one disk offline (incl. multipart object)
- bitrot read-through with two corrupted shards per object
- fresh-disk replacement healed via admin deep heal after a SIGKILL
restart
Also reuse the shared signed_admin_post helper from chaos.rs in the
heal regression suite instead of a duplicated local copy.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Zhengchao An