feat: add scheduler-k3s:charts:set and :charts:report

Helm chart overrides on the scheduler-k3s plugin were previously set
through the generic `scheduler-k3s:set --global chart.<chart>.<property>`
interface, which mixed chart-level configuration into the same command
that manages scheduler properties and offered no focused way to inspect
which overrides were configured. A dedicated `scheduler-k3s:charts:set`
sets and clears chart-specific helm values, and a complementary
`scheduler-k3s:charts:report` surfaces configured overrides per chart
with optional JSON output and single-field flag queries. The legacy form
on `scheduler-k3s:set` continues to work but now emits a deprecation
warning pointing users at the new subcommand.

tests/unit/scheduler-k3s-charts.bats

@@ -0,0 +1,107 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  global_setup
+}
+
+teardown() {
+  dokku scheduler-k3s:charts:set cert-manager.installCRDs >/dev/null 2>/dev/null || true
+  dokku scheduler-k3s:charts:set cert-manager.version >/dev/null 2>/dev/null || true
+  dokku scheduler-k3s:charts:set traefik.replicas >/dev/null 2>/dev/null || true
+  global_teardown
+}
+
+@test "(scheduler-k3s:charts:set) sets and unsets a chart property" {
+  run /bin/bash -c "dokku scheduler-k3s:charts:set cert-manager.installCRDs false"
+  assert_success
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:report cert-manager --format json | jq -r '.\"cert-manager.installCRDs\"'"
+  assert_success
+  assert_output "false"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:report cert-manager"
+  assert_success
+  assert_output_contains "cert-manager chart information"
+  assert_output_contains "Chart property installCRDs:"
+  assert_output_contains "false"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:set cert-manager.installCRDs"
+  assert_success
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:report cert-manager --format json"
+  assert_success
+  assert_output "{}"
+
+  run /bin/bash -c "dokku scheduler-k3s:report --global --format json | jq -r '.\"scheduler-k3s-global-chart.cert-manager.installCRDs\" // \"missing\"'"
+  assert_success
+  assert_output "missing"
+}
+
+@test "(scheduler-k3s:charts:set) rejects invalid chart names and malformed property args" {
+  run /bin/bash -c "dokku scheduler-k3s:charts:set"
+  assert_failure
+  assert_output_contains "Invalid property"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:set cert-manager"
+  assert_failure
+  assert_output_contains "Invalid property"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:set .version 1.0"
+  assert_failure
+  assert_output_contains "Invalid property"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:set cert-manager. 1.0"
+  assert_failure
+  assert_output_contains "Invalid property"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:set not-a-chart.version 1.0"
+  assert_failure
+  assert_output_contains "Invalid chart name"
+
+  run /bin/bash -c "dokku scheduler-k3s:set --global chart.cert-manager.version 1.13.3"
+  assert_success
+  assert_output_contains "deprecated"
+
+  run /bin/bash -c "dokku scheduler-k3s:set --global chart.cert-manager.version"
+  assert_success
+}
+
+@test "(scheduler-k3s:charts:report) per-chart, single-flag query, and flat JSON" {
+  run /bin/bash -c "dokku scheduler-k3s:charts:set cert-manager.version 1.13.3"
+  assert_success
+  run /bin/bash -c "dokku scheduler-k3s:charts:set traefik.replicas 2"
+  assert_success
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:report"
+  assert_success
+  assert_output_contains "cert-manager chart information"
+  assert_output_contains "traefik chart information"
+  assert_output_contains "longhorn chart information"
+  assert_output_contains "ingress-nginx chart information"
+  assert_output_contains "keda chart information"
+  assert_output_contains "keda-add-ons-http chart information"
+  assert_output_contains "vector chart information"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:report cert-manager"
+  assert_success
+  assert_output_contains "cert-manager chart information"
+  assert_output_contains "Chart property version:"
+  assert_output_contains "1.13.3"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:report cert-manager"
+  assert_output_not_contains "traefik chart information"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:report --scheduler-k3s-charts-cert-manager.version"
+  assert_success
+  assert_output "1.13.3"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:report --format json | jq -r '.\"cert-manager.version\"'"
+  assert_success
+  assert_output "1.13.3"
+
+  run /bin/bash -c "dokku scheduler-k3s:charts:report --format json | jq -r '.\"traefik.replicas\"'"
+  assert_success
+  assert_output "2"
+}