feat(GRO-566): add SKIP_OOBE env var to bypass setup wizard

SKIP_OOBE=true|1|yes causes GET /api/setup/status to return
needsSetup: false regardless of DB state. Useful in dev/test
environments where the DB has data but OOBE would block access.

Changes:
- apps/api/src/routes/setup.ts: SKIP_OOBE check in GET /status
- .env.example: document SKIP_OOBE=false
- apps/api/src/__tests__/setup.test.ts: cover SKIP_OOBE=true|1|yes

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.env.example

@@ -11,6 +11,12 @@ AUTH_DISABLED=false
 OIDC_ISSUER=https://authentik.example.com
 OIDC_AUDIENCE=groombook
 
+# ── Setup Wizard ─────────────────────────────────────────────────────────────
+# When SKIP_OOBE=true, the setup wizard is bypassed regardless of whether a
+# super user exists in the database. Useful in dev/test environments where the
+# database has data but the setup wizard would otherwise block access.
+SKIP_OOBE=false
+
 # ── API ───────────────────────────────────────────────────────────────────────
 PORT=3000
 CORS_ORIGIN=http://localhost:8080