ci: bump Node heap to 4 GB for sdk-generation pyright step (#43)

The Generate workflow has been OOM-crashing on the v2025-11-15 SDKs:

  FATAL ERROR: Ineffective mark-compacts near heap limit Allocation
  failed - JavaScript heap out of memory

Diagnosis (run 26171584374):
- Speakeasy CLI's Compile SDK step invokes `uv run python -m pyright`
  on each generated SDK.
- Pyright is a Node.js application. On the v2025-11-15 embedded SDK,
  pyright's peak RSS is ~3.77 GB (measured locally).
- The Generate runner's default Node max-old-space-size is ~2 GB, so
  pyright OOMs before completing.

Reproduced locally:
  NODE_OPTIONS=--max-old-space-size=2048 → identical OOM
  NODE_OPTIONS=--max-old-space-size=4096 → pyright passes (0 errors)

Pass NODE_OPTIONS via `cli_environment_variables` (the
`Gusto/sdk-generation-action` reusable workflow propagates these into
the Speakeasy CLI's process env, which pyright inherits via
uv → python → node).

Author: azrosen92

.github/workflows/sdk_generation.yaml

@@ -24,6 +24,13 @@ jobs:
       force: ${{ github.event.inputs.force }}
       mode: pr
       set_version: ${{ github.event.inputs.set_version }}
+      # Bump Node heap so pyright doesn't OOM on the larger SDKs (the
+      # default Node max-old-space-size on the runner is ~2 GB, and
+      # pyright peaks at ~3.8 GB on the v2025-11-15 embedded SDK).
+      # Verified locally: NODE_OPTIONS=--max-old-space-size=2048 reproduces
+      # the CI OOM; 4096 makes pyright pass cleanly.
+      environment: |
+        NODE_OPTIONS=--max-old-space-size=4096
       runs-on: "{\"group\": \"gusto-ubuntu-default\"}"
     secrets:
       github_access_token: ${{ secrets.GITHUB_TOKEN }}