perf(ci): skip unused main source maps in PR build fixtures (#29512)

Co-authored-by: OrcaWin <293788423+OrcaWin@users.noreply.github.com>

.github/workflows/e2e.yml

@@ -106,6 +106,7 @@ jobs:
       - name: Build E2E outputs
         env:
           VITE_EXPOSE_STORE: 'true'
+          ORCA_CI_MAIN_SOURCEMAPS: '0'
         run: pnpm run build:electron-vite:parallel --mode e2e
 
       # The CLI emits into out/main too; start only after Electron finishes clearing that tree.

.github/workflows/pr.yml

@@ -1154,6 +1154,8 @@ jobs:
           timeout 300 sudo apt-get install -y cpio rpm
 
       - name: Build package inputs
+        env:
+          ORCA_CI_MAIN_SOURCEMAPS: '0'
         run: |
           status=0
           pnpm run build:cli || status=1
@@ -1420,6 +1422,8 @@ jobs:
       # electron-vite targets overlap instead of running back to back. The Linux package
       # job already packages and smoke-tests an AppImage built that way.
       - name: Build package inputs
+        env:
+          ORCA_CI_MAIN_SOURCEMAPS: '0'
         run: pnpm run build:release:parallel
 
       - name: Prepare Electron native runtime