ci(server,emails): run lingui extract & compile on PRs to gate i18n breakage (#22086)

## Why

Translations for `twenty-server` and `twenty-emails` are only extracted
**after merge** — in `i18n-push.yaml` (push to `main`). Their PR
workflows (`ci-server.yaml`, `ci-emails.yaml`) never run `lingui
extract`, so a change that crashes extraction passes every PR check and
only fails post-merge — the same process gap that let the frontend crash
through (fixed in #22080, frontend gate in #22084).

Both projects have a `lingui:extract` target and are extracted by
`i18n-push.yaml`, so the equivalent guard applies.

## What

- **`ci-server.yaml`** — add `lingui:extract` to the existing
`server-lint-typecheck` job's `nx-affected` tasks (`tag:
scope:backend`). That job already builds `twenty-shared` and is already
part of `ci-server-status-check`, so no new job/wiring is needed:
  ```
  tasks: lint,typecheck  ->  tasks: lint,typecheck,lingui:extract
  ```
- **`ci-emails.yaml`** — add a `lingui:extract` step to the
`emails-test` job (this workflow has no `nx-affected` job, so a direct
target run fits):
  ```yaml
  - name: Extract translations (lingui)
    run: npx nx run twenty-emails:lingui:extract
  ```

Both run the same extraction command as the post-merge `i18n-push`
workflow, so failures are caught before merge.

## Notes

- `lingui extract` exits non-zero on extraction failures (verified on
the frontend crash: exit code 1), so these steps genuinely fail the job.
- Both jobs already gate on `changed-files-check`, so extract only runs
when the respective package changes.
- `nx affected -t=lingui:extract` only runs for projects that have the
target; `lingui:extract`'s `^build` dependency is resolved automatically
by nx.

Completes the extract-gate coverage started for the frontend in #22084.


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.github/workflows/ci-emails.yaml

@@ -35,6 +35,10 @@ jobs:
         uses: ./.github/actions/yarn-install
       - name: Build twenty-emails
         run: npx nx build twenty-emails
+      - name: Extract translations (lingui)
+        run: npx nx run twenty-emails:lingui:extract
+      - name: Compile translations (lingui)
+        run: npx nx run twenty-emails:lingui:compile
       - name: Run email tests
         run: |
           # Start the email server in the background

.github/workflows/ci-server.yaml

@@ -77,11 +77,17 @@ jobs:
         uses: ./.github/actions/yarn-install
       - name: Build twenty-shared
         run: npx nx build twenty-shared
-      - name: Server / Run lint & typecheck
+      - name: Server / Run lint, typecheck & lingui extract
         uses: ./.github/actions/nx-affected
         with:
           tag: scope:backend
-          tasks: lint,typecheck
+          tasks: lint,typecheck,lingui:extract
+      # Separate step so compile never races extract on the .po files.
+      - name: Server / Run lingui compile
+        uses: ./.github/actions/nx-affected
+        with:
+          tag: scope:backend
+          tasks: lingui:compile
 
   server-previous-version-upgrade-mutation-guard:
     timeout-minutes: 5