ci: split tracker-policy into separate issue and PR workflows

Gitea Actions reports skipped jobs as a non-success status, which caused
label-issue to block PRs even though its if-condition correctly excluded it.
Two dedicated workflows eliminate the skipped-job problem entirely.

After merge, update the branch-protection required status context from
`tracker-policy / check-pr` to `tracker-policy-pr / check-pr`.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/tracker-policy-issues.yml

@@ -0,0 +1,17 @@
+name: tracker-policy-issues
+
+on:
+  issues:
+    types: [opened, unlabeled]
+
+jobs:
+  label-issue:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - uses: actions/checkout@v4
+      - name: Ensure the issue has a label
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: python3 scripts/tracker_policy.py label-issue

.gitea/workflows/tracker-policy-pr.yml

@@ -0,0 +1,18 @@
+name: tracker-policy-pr
+
+on:
+  pull_request:
+    types: [opened, edited, reopened, synchronized, labeled, unlabeled]
+
+jobs:
+  check-pr:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: read
+      pull-requests: read
+    steps:
+      - uses: actions/checkout@v4
+      - name: Require an unlabeled PR linked to an issue
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: python3 scripts/tracker_policy.py check-pr

.gitea/workflows/tracker-policy.yml

@@ -1,33 +0,0 @@
-name: tracker-policy
-
-on:
-  issues:
-    types: [opened, unlabeled]
-  pull_request:
-    types: [opened, edited, reopened, synchronized, labeled, unlabeled]
-
-jobs:
-  label-issue:
-    if: ${{ github.event_name == 'issues' }}
-    runs-on: ubuntu-latest
-    permissions:
-      issues: write
-    steps:
-      - uses: actions/checkout@v4
-      - name: Ensure the issue has a label
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: python3 scripts/tracker_policy.py label-issue
-
-  check-pr:
-    if: ${{ github.event_name == 'pull_request' }}
-    runs-on: ubuntu-latest
-    permissions:
-      issues: read
-      pull-requests: read
-    steps:
-      - uses: actions/checkout@v4
-      - name: Require an unlabeled PR linked to an issue
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: python3 scripts/tracker_policy.py check-pr