[dmt] linter for checking rules and dashboards for source=deckhouse label

[rvekaterina]

Summary

• New linter rule source-label that checks all PrometheusRule expressions and Grafana dashboard panel queries for the presence of the source="deckhouse" label selector on every metric.
• Recording rule names are automatically collected across all modules and excluded from the check.
• Synthetic Prometheus metrics (ALERTS, ALERTS_FOR_STATE) are excluded.
• Per-module configuration: disable flag, allowed-metrics list with glob pattern support (e.g. coredns_*).
• Bug fix: operator-prometheus -> operator-prometheus-crd

Example

Module .dmtlint.yaml config:

linters:
  templates:
    source-label:
      disable: false
      allowed-metrics:
        - "coredns_*"
        - "etcd_*"

[diyliv]

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Summary

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Example

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[Copilot]

Pull request overview

This PR introduces a new Templates linter rule (source-label) to enforce that PrometheusRule expressions and Grafana dashboard PromQL queries include the source="deckhouse" label selector, with support for module-level opt-out and metric allowlisting.

Changes:

• Added source-label rule implementation (PromQL AST inspection + Grafana dashboard/query parsing) with exclusions for recording rules and synthetic metrics.
• Wired the new rule into the Templates linter execution flow and configuration mapping (local + global rule impact, per-module settings).
• Added unit tests for glob matching, datasource detection, Grafana query sanitization, and core rule behavior.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
pkg/linters/templates/templates.go	Instantiates and runs the new source-label rule for PrometheusRule objects and Grafana dashboards.
pkg/linters/templates/rules/source_label.go	Implements PromQL inspection + Grafana dashboard parsing/sanitization to enforce source="deckhouse".
pkg/linters/templates/rules/source_label_test.go	Adds unit tests for the new rule helpers and core checking behavior.
pkg/config/linters_settings.go	Adds per-module config schema for templates.source-label settings and rule level mapping.
pkg/config/global/global.go	Adds global rule level configuration entry for source-label.
pkg/config.go	Extends runtime linter config with SourceLabelSettings (incl. recording rule names injection).
internal/module/module.go	Adds a setter to inject collected recording rule names into module linter config before linting.
internal/manager/manager.go	Collects recording rule names across modules once and injects them into each module prior to running linters.
internal/values/global-openapi/values.yaml	Updates enabledModules examples/defaults (appears unrelated to the linter change).

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