chore(ci): namespace the backport labels under kind/

The labels.yml header declares that names follow the Kubernetes scheme,
but backport and backport-previous were top-level, violating it. Rename
them to kind/backport and kind/backport-previous, grouped under the kind/
section, and carry the old names as aliases so EndBug/label-sync renames
in place without dropping history on already-tagged issues and PRs.

Update the label literals in backport.yaml in lockstep (the if filter and
the label-detection script). pr-labeler.yaml's 'backport' entry is a
Conventional-Commit scope-to-area mapping, not a label reference, so it is
left unchanged. The top-level release label is a functional trigger keyed
by name in several workflows; renaming it is a wider cross-workflow change
out of scope here, so it is left as-is intentionally.

Signed-off-by: IvanHunters <xorokhotnikov@gmail.com>

.github/labels.yml

@@ -78,6 +78,18 @@
   color: 'e11d21'
   description: Indicates the change introduces a breaking API or behaviour change
 
+# kind/backport-previous has no upstream Kubernetes equivalent (k8s has no
+# two-release-line model); it stays under kind/ per the file convention.
+- name: kind/backport
+  color: 'fbca04'
+  description: Categorizes issue or PR as requiring a backport to the current release line
+  aliases: ['backport']
+
+- name: kind/backport-previous
+  color: 'fbd876'
+  description: Categorizes issue or PR as requiring a backport to the previous release line
+  aliases: ['backport-previous']
+
 # ──────────────────────────────────────────────
 # priority/ — urgency
 # ──────────────────────────────────────────────
@@ -282,14 +294,6 @@
   color: 'aaaaaa'
   description: Requires resolving an issue in an upstream project
 
-- name: backport
-  color: 'fbca04'
-  description: Should change be backported on previous release
-
-- name: backport-previous
-  color: 'fbd876'
-  description: Backport target — previous release line
-
 - name: release
   color: 'aaaaaa'
   description: Releasing a new Cozystack version

.github/workflows/backport.yaml

@@ -95,8 +95,8 @@ jobs:
       github.event.pull_request.merged == true &&
       github.event.pull_request.base.ref == 'main' &&
       (
-        (github.event.action == 'closed' && (contains(github.event.pull_request.labels.*.name, 'backport') || contains(github.event.pull_request.labels.*.name, 'backport-previous'))) ||
-        (github.event.action == 'labeled' && (github.event.label.name == 'backport' || github.event.label.name == 'backport-previous'))
+        (github.event.action == 'closed' && (contains(github.event.pull_request.labels.*.name, 'backport') || contains(github.event.pull_request.labels.*.name, 'backport-previous') || contains(github.event.pull_request.labels.*.name, 'kind/backport') || contains(github.event.pull_request.labels.*.name, 'kind/backport-previous'))) ||
+        (github.event.action == 'labeled' && (github.event.label.name == 'backport' || github.event.label.name == 'backport-previous' || github.event.label.name == 'kind/backport' || github.event.label.name == 'kind/backport-previous'))
       )
     # GitHub API calls only — no docker, no repo toolchain: GitHub-hosted.
     runs-on: ubuntu-latest
@@ -144,8 +144,12 @@ jobs:
           script: |
             const pr = context.payload.pull_request;
             const labels = pr.labels.map(l => l.name);
-            const isBackport = labels.includes('backport');
-            const isBackportPrevious = labels.includes('backport-previous');
+            // Both spellings are accepted on purpose. The namespaced names are
+            // the convention this repo declares, but the org-level dosubot still
+            // applies the legacy ones and it is the dominant applier on real
+            // backports, so dropping them would silently stop the bot for those.
+            const isBackport = labels.includes('kind/backport') || labels.includes('backport');
+            const isBackportPrevious = labels.includes('kind/backport-previous') || labels.includes('backport-previous');
             
             core.setOutput('backport', isBackport ? 'true' : 'false');
             core.setOutput('backport_previous', isBackportPrevious ? 'true' : 'false');