fix: increase timeouts for slow systems

Phase 2 of worker lifecycle fix - applying timeout increases:

- hook-constants.ts: DEFAULT 120s→300s, HEALTH_CHECK 1s→30s, RETRIES 15→300
- worker-service.ts: context init 30s→300s, MCP 15s→300s, PowerShell 5s→60s
- BranchManager.ts: GIT_COMMAND 30s→300s, NPM_INSTALL 120s→600s
- hooks.json: worker start/restart 30s→180s, hook execution 120s→300s

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/services/worker/BranchManager.ts

@@ -28,9 +28,9 @@ function isValidBranchName(branchName: string): boolean {
   return validBranchRegex.test(branchName) && !branchName.includes('..');
 }
 
-// Timeout constants
-const GIT_COMMAND_TIMEOUT_MS = 30_000;
-const NPM_INSTALL_TIMEOUT_MS = 120_000;
+// Timeout constants (increased for slow systems)
+const GIT_COMMAND_TIMEOUT_MS = 300_000;
+const NPM_INSTALL_TIMEOUT_MS = 600_000;
 const DEFAULT_SHELL_TIMEOUT_MS = 60_000;
 
 export interface BranchInfo {