Refactor hook timeout settings to use centralized constants

- Introduced a new module `hook-constants.ts` to define timeout constants for various hooks.
- Updated `cleanup-hook.ts`, `context-hook.ts`, `save-hook.ts`, and `summary-hook.ts` to utilize the new `HOOK_TIMEOUTS.DEFAULT` for fetch timeouts instead of hardcoded values.
- Adjusted worker utility timeouts in `worker-utils.ts` to use constants from `hook-constants.ts`, improving maintainability and consistency across the codebase.

src/shared/hook-constants.ts

@@ -0,0 +1,13 @@
+export const HOOK_TIMEOUTS = {
+  DEFAULT: 5000,              // Standard HTTP timeout (up from 2000ms)
+  HEALTH_CHECK: 1000,         // Worker health check (up from 500ms)
+  WORKER_STARTUP_WAIT: 1000,
+  WORKER_STARTUP_RETRIES: 15,
+  WINDOWS_MULTIPLIER: 1.5     // Platform-specific adjustment
+} as const;
+
+export function getTimeout(baseTimeout: number): number {
+  return process.platform === 'win32'
+    ? Math.round(baseTimeout * HOOK_TIMEOUTS.WINDOWS_MULTIPLIER)
+    : baseTimeout;
+}