refactor: extract inline middleware from index.ts into separate modules (#85)

- Extract update middleware to routes/update.ts
- Extract health middleware and version logic to routes/health.ts
- Extract shutdown logic to services/shutdown.ts
- Extract gateway init to services/gateway-bootstrap.ts
- Remove unused variables, fix duplicate app creation
- Bump version to 0.4.0

index.ts: 260 lines → 80 lines

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/server/src/services/gateway-bootstrap.ts

@@ -0,0 +1,18 @@
+let gatewayManager: any = null
+
+export function getGatewayManagerInstance(): any {
+  return gatewayManager
+}
+
+export async function initGatewayManager(): Promise<void> {
+  const { GatewayManager } = await import('./hermes/gateway-manager')
+  const { getActiveProfileName } = await import('./hermes/hermes-profile')
+  const { setGatewayManager } = await import('../routes/hermes/gateways')
+
+  const activeProfile = getActiveProfileName()
+  gatewayManager = new GatewayManager(activeProfile)
+  setGatewayManager(gatewayManager)
+
+  await gatewayManager.detectAllOnStartup()
+  await gatewayManager.startAll()
+}