refactor: isolate playback and upload use cases

.gitea/workflows/ci-boundaries.yml

@@ -0,0 +1,27 @@
+name: ci / module boundaries
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'packages/core/src/**'
+      - 'apps/web/src/features/uploads/**'
+      - 'services/api/internal/uploads/**'
+      - 'scripts/check-boundaries.mjs'
+      - '.gitea/workflows/ci-boundaries.yml'
+  pull_request:
+    paths:
+      - 'packages/core/src/**'
+      - 'apps/web/src/features/uploads/**'
+      - 'services/api/internal/uploads/**'
+      - 'scripts/check-boundaries.mjs'
+      - '.gitea/workflows/ci-boundaries.yml'
+
+jobs:
+  boundaries:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with: { node-version: '22' }
+      - run: node scripts/check-boundaries.mjs