fix(ci): generate api-inventory.json before e2e

Last CI run (0129781) cleared the pnpm-workspace + version mismatch
but exposed the next failure: `e2e/api-contracts.spec.ts:49` reads
`tmp/api-inventory.json` which is generated by
`scripts/audit-api-contracts.mjs`. `tmp/` is gitignored so checkout
never has the file; the spec then `readFileSync` ENOENTs and the
whole chromium project fails before any test runs.

Added a `Generate API inventory` step in the e2e job, between
playwright install and the chromium run, so the spec finds the
freshly-built JSON every time.

Verified locally: `node scripts/audit-api-contracts.mjs` exits 0
and emits `tmp/api-inventory.json`.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: B2JK-Industry

.github/workflows/ci.yml

@@ -60,6 +60,11 @@ jobs:
         run: pnpm install --frozen-lockfile
       - name: Install Playwright Chromium
         run: pnpm exec playwright install --with-deps chromium
+      - name: Generate API inventory
+        # `e2e/api-contracts.spec.ts` reads `tmp/api-inventory.json`;
+        # `tmp/` is gitignored so the file doesn't survive checkout.
+        # Regenerate it from the live route tree before running e2e.
+        run: node scripts/audit-api-contracts.mjs
       - name: Run chromium project
         env:
           CI: "1"