Run the intake gate scenarios as a CI step rather than a pre-commit hook

A pre-commit hook would make node a requirement for anyone running pre-commit --all-files locally, which CONTRIBUTING.md asks Python contributors to do.

No-Verification-Needed: CI wiring only
Signed-off-by: Max Isbey <224885523+maxisbey@users.noreply.github.com>

Author: maxisbey

.github/scripts/pr_intake_gate.test.js

@@ -5,7 +5,7 @@
 //   node --test .github/scripts/pr_intake_gate.test.js
 //
 // No dependencies; the GitHub client is a small fake defined at the bottom.
-// pre-commit runs this whenever the gate script or this file changes.
+// CI runs it in the checks job (.github/workflows/shared.yml).
 'use strict';
 
 const test = require('node:test');

.github/workflows/shared.yml

@@ -41,6 +41,9 @@ jobs:
         with:
           extra_args: --all-files --verbose
 
+      - name: PR intake gate scenarios
+        run: node --test .github/scripts/pr_intake_gate.test.js
+
       - name: Surface types match vendored schema
         run: |
           uv sync --group codegen --frozen

.pre-commit-config.yaml

@@ -48,12 +48,6 @@ repos:
         language: system
         types: [python]
         pass_filenames: false
-      - id: pr-intake-gate
-        name: PR intake gate scenarios
-        entry: node --test .github/scripts/pr_intake_gate.test.js
-        language: system
-        files: ^\.github/scripts/pr_intake_gate
-        pass_filenames: false
       - id: uv-lock-check
         name: Check uv.lock is up to date
         entry: uv lock --check