fix(ci): release workflow never built @modelforge/contracts before running tests

Same root cause already fixed in ci.yml's test/server/e2e/sbom jobs,
just not yet applied here: frontend/ and app/ depend on
packages/contracts via file:../packages/contracts, which npm ci only
symlinks into their node_modules -- it never builds that package's own
dist/ output or installs its own deps. 'Run tests' has no prebuild hook
(unlike the 'Build' step further down, which self-heals via app/'s own
prebuild), so vitest/vite failed to resolve '@modelforge/contracts' at
all -- exactly what broke the actual v1.3.0 release build just now.

Reproduced by removing packages/contracts/node_modules and dist/
entirely and confirming the same Vite import-analysis failure; fixed by
installing and building it first, then confirmed both
'npm --prefix frontend test' and 'npm --prefix app test' pass in full
(101 and 1018 tests respectively).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: voidstackloop

.github/workflows/release.yml

@@ -24,6 +24,20 @@ jobs:
         with:
           node-version: 22
 
+      # frontend/ and app/ both depend on this via `file:../packages/contracts`
+      # (see their package.json). `npm ci` in either just symlinks
+      # packages/contracts itself into their node_modules — it never builds
+      # *that* package's own dist/ output, and never installs its own
+      # dependencies (zod, typescript) either, since this repo uses plain
+      # `file:` references rather than true npm workspaces. Only app/'s own
+      # `npm run build` below self-heals via a `prebuild` hook; "Run tests"
+      # has no such hook and fails to resolve `@modelforge/contracts` at all
+      # without this step (see ci.yml's identical step for the same fix
+      # applied there first).
+      - name: Install and build @modelforge/contracts
+        working-directory: packages/contracts
+        run: npm ci && npm run build
+
       - name: Install frontend dependencies
         working-directory: frontend
         run: npm ci