fix: target available Gitea runners and portable document pagination tests

.gitea/workflows/ci.yml

@@ -1,13 +1,16 @@
-name: Core CI
+name: Linux CI
 on: [push, pull_request]
+# Gitea currently has Ubuntu runners only; native Windows/macOS are separate
+# release gates. Cancel obsolete branch runs instead of accumulating work.
+concurrency:
+  group: searchi-ci-${{ github.ref }}
+  cancel-in-progress: true
 env:
   SEARCHI_FORCE_CPU: "1"
 jobs:
   core:
-    strategy:
-      matrix:
-        os: [windows-latest, ubuntu-latest, macos-latest]
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
@@ -17,10 +20,8 @@ jobs:
       - run: cargo clippy --workspace --all-targets -- -D warnings
       - run: cargo test --workspace --locked
   desktop:
-    strategy:
-      matrix:
-        os: [windows-latest, ubuntu-latest, macos-latest]
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 25
     defaults:
       run:
         working-directory: apps/desktop