Increase AI chat expiration time to 30 days (#1698)

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Fixes OPS-3159.

Author: Roman Snapko

packages/server/shared/src/lib/system/system.ts

@@ -95,7 +95,7 @@ const systemPropDefaultValues: Partial<Record<SystemProp, string>> = {
   [AppSystemProp.REQUEST_BODY_LIMIT]: '10',
   [SharedSystemProp.LANGFUSE_HOST]: 'https://us.cloud.langfuse.com',
   [AppSystemProp.MAX_LLM_CALLS_WITHOUT_INTERACTION]: '100',
-  [AppSystemProp.LLM_CHAT_EXPIRE_TIME_SECONDS]: '86400', // 24 hours
+  [AppSystemProp.LLM_CHAT_EXPIRE_TIME_SECONDS]: '2592000', // 30 days
   [AppSystemProp.TELEMETRY_MODE]: 'COLLECTOR',
   [AppSystemProp.TELEMETRY_COLLECTOR_URL]: 'https://telemetry.openops.com/save',
   [SharedSystemProp.ENABLE_HOST_VALIDATION]: 'true',