s3: fix health check endpoints returning 404 for HEAD requests #8243 (#8248)

* Fix disk errors handling in vacuum compaction

When a disk reports IO errors during vacuum compaction (e.g., 'read /mnt/d1/weed/oc_xyz.dat: input/output error'), the vacuum task should signal the error to the master so it can:
1. Drop the faulty volume replica
2. Rebuild the replica from healthy copies

Changes:
- Add checkReadWriteError() calls in vacuum read paths (ReadNeedleBlob, ReadData, ScanVolumeFile) to flag EIO errors in volume.lastIoError
- Preserve error wrapping using %w format instead of %v so EIO propagates correctly
- The existing heartbeat logic will detect lastIoError and remove the bad volume

Fixes issue #8237

* error

* s3: fix health check endpoints returning 404 for HEAD requests #8243

weed/s3api/s3api_server.go

@@ -434,8 +434,8 @@ func (s3a *S3ApiServer) registerRouter(router *mux.Router) {
 	s3a.registerS3TablesRoutes(apiRouter)
 
 	// Readiness Probe
-	apiRouter.Methods(http.MethodGet).Path("/status").HandlerFunc(s3a.StatusHandler)
-	apiRouter.Methods(http.MethodGet).Path("/healthz").HandlerFunc(s3a.StatusHandler)
+	apiRouter.Methods(http.MethodGet, http.MethodHead).Path("/status").HandlerFunc(s3a.StatusHandler)
+	apiRouter.Methods(http.MethodGet, http.MethodHead).Path("/healthz").HandlerFunc(s3a.StatusHandler)
 
 	// Object path pattern with (?s) flag to match newlines in object keys
 	const objectPath = "/{object:(?s).+}"