Feat v0.3.8 distribution (#21)

Bundled packages auto-install on first boot for zero-config first run.
Builder image for faster custom builds. Per-environment allowlists for
K8s/Helm (dev=all, test=all, prod=skip).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

k8s/switchboard.yaml

@@ -155,6 +155,12 @@ spec:
               optional: true
         - name: S3_FORCE_PATH_STYLE
           value: "true"
+        # Bundled packages (v0.3.8)
+        # Dev: install all (empty = all). Test: install all. Prod: skip (nothing bundled needed yet).
+        - name: SKIP_BUNDLED_PACKAGES
+          value: "${SKIP_BUNDLED_PACKAGES}"
+        - name: BUNDLED_PACKAGES
+          value: "${BUNDLED_PACKAGES}"
         volumeMounts:
         - name: storage
           mountPath: /data/storage