* test(s3/lifecycle): cover InMemoryPersister deep-copy contract
8 tests pin the persister contract other lifecycle tests rely on for
cursor checkpointing: Load on an unknown shard returns an empty map
(not an error); Save then Load roundtrips; Save copies the input so
caller-side mutation doesn't bleed into stored state; Load returns a
copy so caller-side mutation of the snapshot doesn't bleed back; Save
replaces (not merges) prior state so stale resume points don't survive
restart; different shards stay isolated; saving an empty map clears
state; concurrent Save+Load is race-free under -race. A regression on
any of these silently corrupts downstream tests.
* test(s3/lifecycle): assert.NotContains for InMemoryPersister key absence
assert.Empty on a map[K]V index returns true when the value is the
zero value, which would mask a key that leaked through with int64(0).
Use assert.NotContains so the assertion fails on key presence
regardless of the stored value.
see https://blog.aqwari.net/xml-schema-go/
1. go get aqwari.net/xml/cmd/xsdgen
2. Add EncodingType element for ListBucketResult in AmazonS3.xsd
3. xsdgen -o s3api_xsd_generated.go -pkg s3api AmazonS3.xsd
4. Remove empty Grantee struct in s3api_xsd_generated.go
5. Remove xmlns: sed s'/http:\/\/s3.amazonaws.com\/doc\/2006-03-01\/\ //' s3api_xsd_generated.go