feat: deliverable review gate, app lifecycle fixes, CI/CD pipeline

- Add deliverable review gate: pause workflow when agents produce important
  documents (PRDs, design docs, etc.) for human review before continuing
- Add company-level reviewDeliverables setting with onboarding card selector
- Block agent heartbeats when deliverable review is pending (agent + CEO)
- Trigger review at document creation time in API server for reliability
- Fix autoApproveHires vs reviewDeliverables conflict in approval-policy
- Fix app quit: force-exit on all platforms (macOS Dock, Windows tray, Linux)
- Add multi-platform CI/CD pipeline (macOS arm64/x64, Windows x64/arm64,
  Linux x64/arm64 with deb/AppImage/rpm/snap) with code signing support

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/renderer/App.tsx

@@ -1087,6 +1087,7 @@ export function App() {
                         approval={selectedApproval}
                         agents={companyAgents}
                         tasks={tasks}
+                        documents={companyDocuments}
                         companyId={currentCompany!.id}
                         onDecide={async (state, note) => {
                           unwrap(await window.agentCompany.decideApproval({ companyId: currentCompany!.id, approvalId: selectedApproval.id, state, decisionNote: note ?? `${state} from desktop control surface.` }));