* fix(s3/audit): emit audit log for successful GET/HEAD
Successful GET/HEAD object requests never produced a fluent audit entry
because those handlers write the response directly (streaming for GET,
WriteHeader for HEAD) and never reach a PostLog call site. The wiki
advertises GET as an audited verb, so the asymmetry surprises operators
who rely on the log for read-access auditing.
Move the safety net into the track() middleware: tag each request with
an audit-tracking flag, let PostLog/PostAccessLog (delete path) mark it,
and emit a single fallback entry after the handler returns when nothing
fired. The recorder's status flows into the fallback so the audit row
still reflects 200/206 vs 404 etc. No double logging for handlers that
already emit (write helpers, error paths, bulk delete).
Refs #9463
* fix(s3/audit): defensive nil checks on audit-tracking helpers
Address PR review: guard against nil request and nil *atomic.Bool stored
under the audit-tracking key. The conditions are unreachable today (the
key is private and we only ever store new(atomic.Bool)), but the checks
are free and keep the helpers safe if a future caller misbehaves.
* test(s3/audit): track() audit fallback coverage + stale comment cleanup (#9469)
test(s3/audit): cover track() fallback wiring + cleanup
Adds two unit tests in weed/s3api/stats_test.go that exercise the
audit-tracking flag set up by track(): one verifies the fallback path
fires when a handler writes the response directly (the GET/HEAD object
regression in #9463), the other verifies the flag is set when a handler
emits PostLog itself so the fallback is skipped.
To make the wiring observable without standing up fluent, PostLog now
marks the audit flag before short-circuiting on a nil Logger; production
behavior is unchanged (no logger, no posting) but the flag stays
consistent.
Also drops two stale comments in s3api_object_handlers.go that still
referenced proxyToFiler — that helper was removed when GET/HEAD started
streaming from volume servers directly.
Stacks on #9467.
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