feat: implement telemetry system for application usage tracking

- Added telemetry utility to capture application events and metrics.
- Integrated PostHog for event tracking with distinct user identification.
- Implemented telemetry initialization, event capturing, and shutdown procedures.

feat: add UV environment setup for Python management

- Created utilities to manage Python installation and configuration.
- Implemented network optimization checks for Python installation mirrors.
- Added functions to set up managed Python environments with error handling.

feat: enhance host API communication with token management

- Introduced host API token retrieval and management for secure requests.
- Updated host API fetch functions to include token in headers.
- Added support for creating event sources with authentication.

test: add comprehensive tests for gateway protocol and startup helpers

- Implemented unit tests for gateway protocol helpers, event dispatching, and state management.
- Added tests for startup recovery strategies and process policies.
- Ensured coverage for connection monitoring and restart governance logic.

electron/gateway/process-handle.ts

@@ -0,0 +1,7 @@
+export interface GatewayProcessHandle {
+  pid: number | undefined;
+  stdout?: NodeJS.ReadableStream | null;
+  stderr?: NodeJS.ReadableStream | null;
+  once(event: string, listener: (...args: any[]) => void): this;
+  kill(signal?: NodeJS.Signals | number): boolean;
+}