Speed up import checks, localization extraction, and CI typechecking (#27727)

* Skip unnecessary compatibility-boundary parsing and benchmark it in CI

* Use pinned preflight Bun for compatibility checks and localization extraction

* Measure two concurrent Bun projects in full preflight and update its scope test

.github/workflows/pr.yml

@@ -290,7 +290,7 @@ jobs:
           PREFLIGHT_PRIOR_SUCCESS: ${{ job.status == 'success' }}
         run: |
           if [ "$PREFLIGHT_PHASE_SELECTED" != true ] || [ "$PREFLIGHT_PRIOR_SUCCESS" != true ]; then exit 0; fi
-          pnpm run typecheck:ci
+          pnpm run typecheck:ci --bun-concurrency=2 --bun-threads=2
 
       - name: Check Zustand selector fan-out budget
         if: needs.code_paths.outputs.static_analysis == 'true'
@@ -348,7 +348,7 @@ jobs:
 
       - name: Check compatibility-folder imports
         if: needs.code_paths.outputs.static_analysis == 'true'
-        run: pnpm run check:compat-boundary-imports
+        run: bun config/scripts/check-compat-boundary-imports.mjs
 
       - name: Check Node runtime pin
         if: needs.code_paths.outputs.static_analysis == 'true'
@@ -356,6 +356,7 @@ jobs:
 
       # Why: extraction writes sorted evidence to an isolated temporary path,
       # so feature PRs need one normalized AST pass rather than a three-OS matrix.
+      # Use preflight's pinned Bun even when the optional local pin differs.
       - name: Verify localization extraction
         if: '!cancelled()'
         id: localization-extraction
@@ -372,7 +373,7 @@ jobs:
             scope="$(node config/scripts/localization-extraction-change-scope.mjs "$RUNNER_TEMP/localization-changes")" && [ "$scope" = false ]; then
             echo "Localization extraction inputs are unchanged."
           else
-            pnpm run verify:localization-extraction
+            bun config/scripts/verify-localization-extraction.mjs
           fi
 
       # Why both: the ratchet proves nothing reachable from the runtime imports electron,

.github/workflows/preflight-benchmark.yml

@@ -58,3 +58,48 @@ jobs:
           name: preflight-static-analysis
           path: .build/preflight-benchmark/
           retention-days: 30
+  compatibility-imports:
+    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+          fetch-depth: 2
+      - uses: ./.github/actions/install-node-dependencies
+        with:
+          native-runtime: none
+          node-version: '24'
+      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+        with:
+          bun-version: 1.4.3
+      - name: Compare compatibility-import scan and runtimes
+        run: node config/scripts/benchmark-preflight-compat-boundary.mjs
+      - uses: actions/upload-artifact@v7
+        if: always()
+        with:
+          name: preflight-compat-boundary
+          path: .build/preflight-benchmark/
+          retention-days: 30
+  localization-extraction:
+    runs-on: ubuntu-24.04-arm
+    timeout-minutes: 12
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+      - uses: ./.github/actions/install-node-dependencies
+        with:
+          native-runtime: none
+          node-version: '24'
+      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+        with:
+          bun-version: 1.4.3
+      - name: Compare localization extraction runtimes and complete catalogs
+        run: node config/scripts/benchmark-preflight-localization-extraction.mjs
+      - uses: actions/upload-artifact@v7
+        if: always()
+        with:
+          name: preflight-localization-extraction
+          path: .build/preflight-benchmark/
+          retention-days: 30