Ignore files which is not Sloth CRD

[makavity]

Hello, faced the problem with validation.

lint:sloth:
  stage: lint
  image: <REDACTED>/devops/sloth-cli:v${SLOTH_VERSION}
  script:
    - sloth validate --input ${CI_PROJECT_DIR}/observability/slo --fs-exclude _gen

Output:

$ sloth validate --input ${CI_PROJECT_DIR}/observability/slo --fs-exclude _gen
2026/07/23 17:04:30 INFO: metrics: disable exposing PSI metrics because of failed init: open /sys/fs/cgroup/kubepods-burstable-podabf5c04c_d6d7_4de5_affb_ccb36e7e0df3.slice:cri-containerd:828c035692d6657ca4239dcc3ea7394b4ed68b943304e9cc2fa2cd89cd188a1b/cpu.pressure: no such file or directory
INFO[0000] SLO period windows loaded                     svc=alert.WindowsRepo version=v0.16.0 window=30d windows=2
INFO[0000] Plugins loaded                                k8s-transform-plugins=0 sli-plugins=0 slo-plugins=12 version=v0.16.0 window=30d
ERRO[0000] invalid SLO: invalid spec, could not load with any of the supported spec types  file=/builds/<REDACTED>/tools/monitoring/observability/slo/teams/edu/ru_portal_product_types_errors.yaml version=v0.16.0 window=30d
ERRO[0000] invalid SLO: invalid spec, could not load with any of the supported spec types  file=/builds/<REDACTED>/tools/monitoring/observability/slo/teams/edu/ru_portal_product_types_latency.yaml version=v0.16.0 window=30d
ERRO[0000] invalid SLO: invalid spec, could not load with any of the supported spec types  file=/builds/<REDACTED>/tools/monitoring/observability/slo/teams/one/ru_portal_user_homework_list_errors.yaml version=v0.16.0 window=30d
ERRO[0000] invalid SLO: invalid spec, could not load with any of the supported spec types  file=/builds/<REDACTED>/tools/monitoring/observability/slo/teams/one/ru_portal_user_homework_list_latency.yaml version=v0.16.0 window=30d
ERRO[0000] invalid SLO: invalid spec, could not load with any of the supported spec types  file=/builds/<REDACTED>/tools/monitoring/observability/slo/teams/site/ru_portal_catalog_cards_errors.yaml version=v0.16.0 window=30d
ERRO[0000] invalid SLO: invalid spec, could not load with any of the supported spec types  file=/builds/<REDACTED>/tools/monitoring/observability/slo/teams/site/ru_portal_catalog_cards_latency.yaml version=v0.16.0 window=30d
error: "validate" command failed: validation failed

That files are not sloth-compatible, it is pyrra files, we are testing many tools to find best for us.

I suppose, the best way for that - is to ignore files, which are not compatible with sloth. Maybe, ignore kind other than PrometheusServiceLevel