Surface six memory.stat fields that are already collected by the cgroups
library but were not exposed by cAdvisor:

  - file_dirty / file_writeback (bytes)
  - pgscan / pgsteal (page reclaim activity)
  - workingset_refault_file / workingset_refault_anon

The values are read from the existing MemoryStats.Stats map in
setMemoryStats (cgroup v2 only; left at zero on cgroup v1) and exposed
through the v1 info API and new Prometheus counters/gauges under the
existing "memory" metric set:

  - container_memory_file_dirty_bytes
  - container_memory_file_writeback_bytes
  - container_memory_pgscan_total
  - container_memory_pgsteal_total
  - container_memory_workingset_refault_file_total
  - container_memory_workingset_refault_anon_total

Signed-off-by: egorikas <egorgrishechko@gmail.com>

…ry module

A subdirectory module holding the kubelet-only surface of cAdvisor (manager,
container, fs, cache, machine, metrics, storage, stats, watcher, cadvisorflags,
and lib/model). The manager exposes injection seams that the full binary fills
in and the kubelet leaves nil, so the library stays lean.

lib/model merges the leaf types of info/v1 and info/v2. Both named a filesystem
type FsInfo (machine-level vs runtime); since they now share one package, the
runtime type keeps the name FsInfo and the machine-level one is FilesystemInfo.

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

root and cmd require+replace github.com/google/cadvisor/lib => ./lib (and
../lib). build.sh stamps version symbols in lib/version; the Makefile and
check_gotidy.sh run tests/lint/tidy over the lib module too.

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

info/v1 becomes thin aliases to lib/model plus the v1 consts and docker types.
info/v2 aliases the identical leaf types and keeps its own ContainerInfo,
ContainerStats and Spec, plus the from-v1 converters the REST handlers use.

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

Redirect moved-package imports to github.com/google/cadvisor/lib/* and delete
the duplicated root copies. The storage-driver registry consolidates into
lib/storage -- root and lib both registered the storage_driver_* flags, which
would double-register. The remaining root packages (collector, events, perf,
resctrl, summary, validate, client, ...) adapt to the library.

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

cmd builds the cAdvisor binary and v1/v2 REST API against lib, registering the
perf/resctrl factories, summary reader, process-list and app-metrics providers,
the cpu-load reader, and the events.EventManager (via the library's EventSink)
into the manager's seams.

Signed-off-by: Davanum Srinivas <davanum@gmail.com>