feat(ci): build socket package bootstrap before SEA and smol builds

Add build step to create packages/socket/dist/bootstrap.js before
building SEA and smol binaries. Both build processes embed this
bootstrap file into their Node.js binaries.

Changes:
- build-sea.yml: Build socket bootstrap before SEA binary creation
- build-smol.yml: Build socket bootstrap before smol compilation

This ensures the bootstrap exists when:
- node-sea-builder creates SEA blob with embedded CLI
- node-smol-builder copies to internal/bootstrap/socketsecurity

Fixes SIGABRT crash:
  Cannot find native builtin: "internal/bootstrap/socketsecurity"

Author: jdalton

.github/workflows/build-sea.yml

@@ -81,6 +81,9 @@ jobs:
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
+      - name: Build socket package bootstrap
+        run: pnpm --filter socket run build
+
       - name: Generate WASM cache keys
         id: wasm-cache-keys
         shell: bash

.github/workflows/build-smol.yml

@@ -81,6 +81,9 @@ jobs:
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
+      - name: Build socket package bootstrap
+        run: pnpm --filter socket run build
+
       - name: Generate smol build cache key
         id: smol-cache-key
         shell: bash